Lowes offers DeWalt Tough Grip 27-Piece Screwdriver Bit Set for $15 (reg $20). Free shipping on orders over $35. 

Product Description:
Take on demanding tasks with TOUGH GRIP™ Screwdriving Bits. With select sizes redesigned to be up to 40X tougher for reduced bit breakage*, these bits can complete challenging jobs with ease. Featuring optimized geometry, the bits for driving T20-T40† fasteners provide tight fit ideal for a wide range of applications. To assist with organization and storage, the TOUGH GRIP™ Combo Bit Sets come packed in the connectable TOUGH CASE®+ System for custom bit storage solutions (additional cases sold separately).

• Select SKUs up to 40X tougher for reduce bit breakage*: Take on a wide variety of demanding applications with a redesigned torsion zone that provides increased impact performance
• Tight fit: Get exceptional fitment for common jobsite tasks with optimized Phillips #2 and star geometries
• Impact Ready®: ¼-in Hex shank allows for use in impact drivers and drills
• Bit combo sets packed in the TOUGH CASE+ System: Keep bit sets organized in the TOUGH CASE®+ System designed for at-a-glance bit identification and quick removal (available with combo sets only)
• *Select sizes versus standard DEWALT® screwdriving bits