SKIL PWRCore 20 20 Volt 1 4 in Variable Speed Cordless Impact Driver (1 Battery Included) Beadboard 0 mm Precision Screwdriver Attachment Options:w Combination Bit Set (65 Pieces) 0 mm Precision Screwdriver Specification Details Nail Size 12D Length 3 PWRCore™ 20 volt 2 and belt clip This impact driver is ideal for heavy duty work like driving large fasteners through dense wood The PWRCore™ 20 volt lithium battery has an innovative temperature management system to keep the battery cool and powering on through your project The 1 4 inch hex collet makes for easy and quick bit changes Variable speed control provides a precise start with full control for a variety of tasks Forward reverse LED indicator quickly helps you determine which direction you're set to drive The LED light illuminates your work area when the trigger is pressed