General description Accessory for a drill, this set of 3 square chuck adapters (1/4", 3/8", 1/2") is made from high-quality chrome vanadium steel. It transforms any drill into a power nut driver, making it a versatile addition to your toolbox. The colorful design with different colored rings allows for easy selection of the right adapter. Technical specifications Material: High quality 6150 CR-V (Chrome-vanadium steel) Length: 1/4" shank - 65mm long, converts to 6.35mm square head Length: 3/8" shank - 65mm long, converts to 9mm square head Length: 1/2" shank - 72mm long, converts to 13mm square head Usage Compatible with pneumatic screwdrivers, electric screwdrivers, pneumatic drills, and manual screwdrivers Great tool for any toolbox set Designed to meet a variety of needs with common drill bit sizes Other information Heavy-duty spring-loaded ball bearing holds sockets securely in place Snap-on socket holds tight and does not slip Replacement guarantee available