This of screwdriver bits 1/4 inch tools fits most powered corded or cordless drills to drive head screws. Strong inner hexagon sleeve without . 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 - Brand: OUNONA. - ColorAssorted Color - Material: Chrome-vanadium steel. - Package size: 12.5 x 9 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 . - This of screwdriver bits tools fits most powered corded or cordless drills to drive head screws. - 14 Pcs 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. Warm Tip: Dear buyer, due to lighting effect, monitor’s brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 14 x OUNONA socket