3Pcs Socket Adapter Set Hex Chuck for 1/4 3/8 1/2 Inch Drill Impact WrenchFeatures:Stainless steel ball lock for a secure fit Sockets snap tightly and won't slip off from 1/4 inch Hex chuck prevents stripping during high-speed operation Super strong heat-treated chrome vanadium stainless steel for normal leather and impact Use-sandblasted finish Converts drills to high-speed socket drivers Applicable to screwdriver chuck or electric screwdriver tools (hexagonal hole or three jaw chuck can be) Driven chuck is used, can be the original hexagonal side after installation into a size to square which can be used for bushing installation, it is a good addition for conversion Specification: Material: CR-V chrome vanadium steel Color: black Size: (approx.) 1/4" x 1/4" x 150mm-1/4" shank can be made into 6.35mm square 3/8" x 1/4" x 150mm-1/4" shank "can be made into a 9.53mm square Shank 1/2" x 1/4" x 150mm-1/4" can be made into a square 12.7mm Quantity: 1 set/3 pcs Note: Please allow 1-3mm error due to manual measurement. Pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 3pcs x Hex Head Bits