Description This set of screwdriver bits 1/4 inch tools fits most powered corded or cordless drills to drive hex head screws. Strong inner hexagon sleeve without magnetic. The specifications of the bits inlcude 3/16(4.76mm),1/4(6.35mm),9/32(7.14mm),5/16(7.93mm), 11/32(8.73mm),3/8(9.53mm), 7/16(11.11mm), 5mm,5.5 mm,6mm,7mm,8mm,10mm,12mm. It's made of chrome-vanadium steel with long life and great durability for use. Easy to install on the screwdriver handle. Widely used in household DIY, woodworking, auto parts, professional machine repairing, etc. Features - Color: As shown - Material: Chrome-vanadium steel - Package Size: 12.5 x 11.5 x 2cm - Inner Hole diameter: 0.6mm - Weight: 201g - Made of chrome-vanadium steel with long life and great durability for use. - Strong inner hexagon sleeve without magnetic. - This set of screwdriver bits tools fits most powered corded or cordless drills to drive hex head screws. - 14 Pcs hex bit sockets include: 3/16(4.76mm),1/4(6.35mm),9/32(7.14mm),5/16(7.93mm), 11/32(8.73mm),3/8(9.53mm), 7/16(11.11mm), 5mm,5.5 mm,6mm,7mm,8mm,10mm,12mm - Wide application. Suitable for household DIY, woodworking, auto parts, professional machine repairing, etc. Made of chrome-vanadium steel with long life and great durability for use. Strong inner hexagon sleeve without magnetic. This set of screwdriver bits tools fits most powered corded or cordless drills to drive hex head screws. 14 Pcs hex bit sockets include: 3/16(4.76mm),1/4(6.35mm),9/32(7.14mm),5/16(7.93mm), 11/32(8.73mm),3/8(9.53mm), 7/16(11.11mm), 5mm,5.5 mm,6mm,7mm,8mm,10mm,12mm Wide application. Suitable for household DIY, woodworking, auto parts, professional machine repairing, etc.