Drillpro 14 x Power Nut Driver Drill Bit Set SAE Metric Socket Wrench Screw 1/4''Hex Shank 3/16", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16" 5mm, 5.5 mm, 6mm, 7mm, 8mm, 10mm, 12mm 3. Applicable for installing in those hexagon tools, such as pneumatic screwdriver, electric screwdriver, pneumatic drill, electric drill, pistol drill, manual screwdriver, etc. Name: Strong inner Hexagon sleeve (without magnetic) Material: chrome vanadium steel