diff --git a/docs/components/pager/index.md b/docs/components/pager/index.md
index c23393aa..c9a23af6 100644
--- a/docs/components/pager/index.md
+++ b/docs/components/pager/index.md
@@ -66,7 +66,14 @@ if ($pager->hasNextPage()) {
 }
 ```
 
-## Adapters
+## Custom Adapters
+
+Creating Custom Adapters is easy. You can take a look at the available adapters
+to see how easy it is.
+
+Please see the [Pager Contract](../../contracts/pager/index.md) to learn more.
+
+## Available Adapters
 
 ### ArrayAdapter
 
@@ -97,10 +104,9 @@ $adapter = new CallableAdapter(
 );
 ```
 
-### ArrayCollectionAdapter
-
+### ArrayCollectionAdapter (doctrine/collections)
 
-!!! warning
+!!! warning "Requires `sonsofphp/pager-doctrine-collections`"
     ```shell
     composer require sonsofphp/pager-doctrine-collections
     ```
@@ -115,3 +121,41 @@ $collection = new ArrayCollection();
 
 $adapter = new ArrayCollectionAdapter($collection);
 ```
+
+### QueryBuilderAdapter (doctrine/dbal)
+
+!!! warning "Requires `sonsofphp/pager-doctrine-dbal`"
+    ```shell
+    composer require sonsofphp/pager-doctrine-dbal
+    ```
+
+```php
+<?php
+
+use Doctrine\DBAL\Query\QueryBuilder;
+use SonsOfPHP\Bridge\Doctrine\DBAL\Pager\QueryBuilderAdapter;
+
+// ...
+
+$adapter = new QueryBuilderAdapter($builder, function (QueryBuilder $builder): void {
+    $builder->select('COUNT(e.id) as total');
+});
+```
+
+### QueryBuilderAdapter (doctrine/orm)
+
+!!! warning "Requires `sonsofphp/pager-doctrine-orm`"
+    ```shell
+    composer require sonsofphp/pager-doctrine-orm
+    ```
+
+```php
+<?php
+
+use Doctrine\ORM\QueryBuilder;
+use SonsOfPHP\Bridge\Doctrine\ORM\Pager\QueryBuilderAdapter;
+
+$builder = $repository->createQueryBuilder('e');
+
+$adapter = new QueryBuilderAdapter($builder);
+```
diff --git a/docs/contracts/pager/index.md b/docs/contracts/pager/index.md
index 550b6de1..d2333a30 100644
--- a/docs/contracts/pager/index.md
+++ b/docs/contracts/pager/index.md
@@ -10,3 +10,37 @@ components.
 ```shell
 composer require sonsofphp/pager-contract
 ```
+
+## AdapterInterface
+
+```php
+<?php
+
+namespace SonsOfPHP\Contract\Pager;
+
+interface AdapterInterface extends \Countable
+{
+    /**
+     * This will return part of the total results
+     *
+     * Offset is where the results to be returned will start, for example, if
+     * offset is 0, it will start with the first record and return $length
+     *
+     * Offset should always be 0 or greater
+     *
+     * Length is how many results to return. For example, if length is 10, a
+     * MAXIMUM of 10 results will be returned
+     *
+     * Length MUST always be a positive number that is 1 or greater OR be null
+     *
+     * If null is passed in as length, this should return ALL the results.
+     *
+     * If the total number of results is less than length, an exception must
+     * not be thrown.
+     *
+     * @throws \InvalidArgumentException
+     *   If offset or length is invalid, this expection will be thrown
+     */
+    public function getSlice(int $offset, ?int $length): iterable;
+}
+```
diff --git a/src/SonsOfPHP/Bridge/Doctrine/Collections/Pager/Tests/ArrayCollectionAdapterTest.php b/src/SonsOfPHP/Bridge/Doctrine/Collections/Pager/Tests/ArrayCollectionAdapterTest.php
new file mode 100644
index 00000000..ede1c857
--- /dev/null
+++ b/src/SonsOfPHP/Bridge/Doctrine/Collections/Pager/Tests/ArrayCollectionAdapterTest.php
@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SonsOfPHP\Bridge\Doctrine\Collections\Pager\Tests;
+
+use Doctrine\Common\Collections\ArrayCollection;
+use PHPUnit\Framework\TestCase;
+use SonsOfPHP\Bridge\Doctrine\Collections\Pager\ArrayCollectionAdapter;
+use SonsOfPHP\Contract\Pager\AdapterInterface;
+
+/**
+ * @coversDefaultClass \SonsOfPHP\Bridge\Doctrine\Collections\Pager\ArrayCollectionAdapter
+ *
+ * @uses \SonsOfPHP\Bridge\Doctrine\Collections\Pager\ArrayCollectionAdapter
+ */
+final class ArrayCollectionAdapterTest extends TestCase
+{
+    /**
+     * @covers ::__construct
+     */
+    public function testItHasTheRightInterface(): void
+    {
+        $adapter = new ArrayCollectionAdapter(new ArrayCollection());
+
+        $this->assertInstanceOf(AdapterInterface::class, $adapter);
+    }
+
+    /**
+     * @covers ::count
+     */
+    public function testCount(): void
+    {
+        $adapter = new ArrayCollectionAdapter(new ArrayCollection(range(0, 9)));
+
+        $this->assertCount(10, $adapter);
+    }
+
+    /**
+     * @covers ::getSlice
+     */
+    public function testGetSlice(): void
+    {
+        $adapter = new ArrayCollectionAdapter(new ArrayCollection(range(0, 9)));
+
+        $this->assertSame([0], $adapter->getSlice(0, 1));
+    }
+}
diff --git a/src/SonsOfPHP/Bridge/Doctrine/DBAL/Pager/QueryBuilderAdapter.php b/src/SonsOfPHP/Bridge/Doctrine/DBAL/Pager/QueryBuilderAdapter.php
index 66ecfd23..7f7eefbb 100644
--- a/src/SonsOfPHP/Bridge/Doctrine/DBAL/Pager/QueryBuilderAdapter.php
+++ b/src/SonsOfPHP/Bridge/Doctrine/DBAL/Pager/QueryBuilderAdapter.php
@@ -8,20 +8,36 @@
 use SonsOfPHP\Contract\Pager\AdapterInterface;
 
 /**
+ * Usage:
+ *    $adapter = new QueryBuilderAdapter($queryBuilder, function (QueryBuilder $builder): void {
+ *        $builder->select('COUNT(DISTINCT e.id) AS cnt');
+ *    });
+ *
  * @author Joshua Estes <joshua@sonsofphp.com>
  */
 class QueryBuilderAdapter implements AdapterInterface
 {
+    private $countQuery;
+
     public function __construct(
-        private QueryBuilder $builder,
-    ) {}
+        private readonly QueryBuilder $builder,
+        callable $countQuery,
+    ) {
+        $this->countQuery = $countQuery;
+    }
 
     /**
      * {@inheritdoc}
      */
     public function count(): int
     {
-        throw new \Exception('@todo');
+        $builder  = clone $this->builder;
+        $callable = $this->countQuery;
+
+        $callable($builder);
+        $builder->setMaxResults(1);
+
+        return (int) $builder->executeQuery()->fetchOne();
     }
 
     /**
@@ -29,6 +45,13 @@ public function count(): int
      */
     public function getSlice(int $offset, ?int $length): iterable
     {
-        throw new \Exception('@todo');
+        $builder = clone $this->builder;
+
+        return $builder
+            ->setFirstResult($offset)
+            ->setMaxResults($length)
+            ->executeQuery()
+            ->fetchAllAssociative()
+        ;
     }
 }
diff --git a/src/SonsOfPHP/Bridge/Doctrine/DBAL/Pager/Tests/QueryBuilderAdapterTest.php b/src/SonsOfPHP/Bridge/Doctrine/DBAL/Pager/Tests/QueryBuilderAdapterTest.php
new file mode 100644
index 00000000..fb2050d0
--- /dev/null
+++ b/src/SonsOfPHP/Bridge/Doctrine/DBAL/Pager/Tests/QueryBuilderAdapterTest.php
@@ -0,0 +1,78 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SonsOfPHP\Bridge\Doctrine\DBAL\Pager\Tests;
+
+use Doctrine\DBAL\Query\QueryBuilder;
+use Doctrine\DBAL\Result;
+use PHPUnit\Framework\TestCase;
+use SonsOfPHP\Bridge\Doctrine\DBAL\Pager\QueryBuilderAdapter;
+use SonsOfPHP\Contract\Pager\AdapterInterface;
+
+/**
+ * @coversDefaultClass \SonsOfPHP\Bridge\Doctrine\DBAL\Pager\QueryBuilderAdapter
+ *
+ * @uses \SonsOfPHP\Bridge\Doctrine\DBAL\Pager\QueryBuilderAdapter
+ */
+final class QueryBuilderAdapterTest extends TestCase
+{
+    private $builder;
+    private $result;
+
+    public function setUp(): void
+    {
+        $this->builder = $this->createMock(QueryBuilder::class);
+        $this->result = $this->createMock(Result::class);
+    }
+
+    /**
+     * @covers ::__construct
+     */
+    public function testItHasTheRightInterface(): void
+    {
+        $adapter = new QueryBuilderAdapter($this->builder, function (QueryBuilder $builder): void {});
+
+        $this->assertInstanceOf(AdapterInterface::class, $adapter);
+    }
+
+    /**
+     * @covers ::count
+     */
+    public function testCount(): void
+    {
+        $this->builder->method('executeQuery')->willReturn($this->result);
+        $this->builder->expects($this->once())->method('select');
+
+        $this->result->method('fetchOne')->willReturn(123);
+
+        $adapter = new QueryBuilderAdapter($this->builder, function (QueryBuilder $builder): void {
+            $builder->select('COUNT()');
+        });
+
+        $this->assertCount(123, $adapter);
+    }
+
+    /**
+     * @covers ::getSlice
+     */
+    public function testSlice(): void
+    {
+        $this->builder
+            ->expects($this->once())
+            ->method('setFirstResult')
+            ->with($this->identicalTo(0))
+            ->willReturn($this->builder)
+        ;
+        $this->builder
+            ->expects($this->once())
+            ->method('setMaxResults')
+            ->with($this->identicalTo(100))
+            ->willReturn($this->builder)
+        ;
+
+        $adapter = new QueryBuilderAdapter($this->builder, function (QueryBuilder $builder): void {});
+
+        $adapter->getSlice(0, 100);
+    }
+}
diff --git a/src/SonsOfPHP/Bridge/Doctrine/ORM/Pager/QueryBuilderAdapter.php b/src/SonsOfPHP/Bridge/Doctrine/ORM/Pager/QueryBuilderAdapter.php
new file mode 100644
index 00000000..2f7cb6e6
--- /dev/null
+++ b/src/SonsOfPHP/Bridge/Doctrine/ORM/Pager/QueryBuilderAdapter.php
@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SonsOfPHP\Bridge\Doctrine\ORM\Pager;
+
+use Doctrine\ORM\QueryBuilder;
+use Doctrine\ORM\Tools\Pagination\Paginator;
+use SonsOfPHP\Contract\Pager\AdapterInterface;
+
+/**
+ * @author Joshua Estes <joshua@sonsofphp.com>
+ */
+class QueryBuilderAdapter implements AdapterInterface
+{
+    private readonly Paginator $paginator;
+
+    public function __construct(
+        QueryBuilder $builder,
+    ) {
+        $this->paginator = new Paginator($builder, fetchJoinCollection: true);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function count(): int
+    {
+        return count($this->paginator);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSlice(int $offset, ?int $length): iterable
+    {
+        $query = $this->paginator->getQuery();
+        $query
+            ->setFirstResult($offset)
+            ->setMaxResults($length)
+        ;
+
+        return $this->paginator->getIterator();
+    }
+}
diff --git a/src/SonsOfPHP/Bridge/Doctrine/ORM/Pager/Tests/QueryBuilderAdapterTest.php b/src/SonsOfPHP/Bridge/Doctrine/ORM/Pager/Tests/QueryBuilderAdapterTest.php
new file mode 100644
index 00000000..8536ffec
--- /dev/null
+++ b/src/SonsOfPHP/Bridge/Doctrine/ORM/Pager/Tests/QueryBuilderAdapterTest.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SonsOfPHP\Bridge\Doctrine\ORM\Pager\Tests;
+
+use Doctrine\ORM\QueryBuilder;
+use PHPUnit\Framework\TestCase;
+use SonsOfPHP\Bridge\Doctrine\ORM\Pager\QueryBuilderAdapter;
+use SonsOfPHP\Contract\Pager\AdapterInterface;
+
+/**
+ * @coversDefaultClass \SonsOfPHP\Bridge\Doctrine\ORM\Pager\QueryBuilderAdapter
+ *
+ * @uses \SonsOfPHP\Bridge\Doctrine\ORM\Pager\QueryBuilderAdapter
+ */
+final class QueryBuilderAdapterTest extends TestCase
+{
+    private $builder;
+
+    public function setUp(): void
+    {
+        $this->builder = $this->createMock(QueryBuilder::class);
+    }
+
+    /**
+     * @covers ::__construct
+     */
+    public function testItHasTheRightInterface(): void
+    {
+        $adapter = new QueryBuilderAdapter($this->builder);
+
+        $this->assertInstanceOf(AdapterInterface::class, $adapter);
+    }
+}
diff --git a/src/SonsOfPHP/Contract/Pager/AdapterInterface.php b/src/SonsOfPHP/Contract/Pager/AdapterInterface.php
index 518c8187..a157d13e 100644
--- a/src/SonsOfPHP/Contract/Pager/AdapterInterface.php
+++ b/src/SonsOfPHP/Contract/Pager/AdapterInterface.php
@@ -20,7 +20,7 @@ interface AdapterInterface extends \Countable
      * Length is how many results to return. For example, if length is 10, a
      * MAXIMUM of 10 results will be returned
      *
-     * Length should always be a positive number that is 1 or greater
+     * Length MUST always be a positive number that is 1 or greater OR be null
      *
      * If null is passed in as length, this should return ALL the results.
      *