▲Wear Resistance Material- The material is forged from high-hardness chrome vanadium steel. The overall high-temperature quenching and heat treatment has high hardness, high torque, and the surface has undergone corrosion-resistant sandblasting.

▲ 1/4 "Hex Shank- The sleeve uses a universal 1/4 "hex shank for a variety of quick-change chucks, various flashlights, and screwdrivers.

▲ Set Configuration-10pcs Inch：5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2; 10pcs metric：4mm,5mm,5.5mm,6mm,7mm,8mm,9mm,10mm, 11mm,12mm

▲Easy to Carry in Your Pocket-Assembled by two convenient plastic strips, it is very suitable for any tool box, pocket; easy to carry and store.

▲ Wide Application- They are very suitable for any electric drill, screwdriver, impact drill, 3D printer, suitable for small residential projects and mechanical maintenance.