Drill Warehouse 10 Pack Magnetic Extension Socket Drill Bit Holder 1/4" Hex Power Tools, Pack in Metal Box Designed for 1/4" hex shank bits. Great for working with hard to reach screws. Must-have accessory set for power drills and impact drivers. Unlimited uses in automotive, hardware, hobby, home, etc. Strong magnet holds bits securely, and the magnet is located inside the chrome tube.