Impact Drill Socket Adapter Converter Set For To 1/4 3/8 1/2 Sq. Drive Driver Specification: 100% Brand new Material: chrome vanadium steel cr-v Dimension: (approx.) 1/4" x 1/4" x 50mm--1/4 "shank can be converted into 6.35 mm square 3/8" x 1/4" x 50mm--1/4 "shank can be converted into 9.53 mm square 1/2" x 1/4" x 50mm--1/4 "shank can be converted into 12.7 mm square Color: as picture shows Features: Stainless Steel Locking Ball Ensures Secure Fit Sockets Snap-On Tightly & Won't Slip Off 1/4-inch Hex Shank Prevents Stripping During High Speed Drill Operation Super Strong Heat Treated Chrome Vanadium Steel for Normal & Impact Use - sandblasted finish Converts power drills into speedy socket drivers Applies to the screwdriver handle or electric screwdriver tools (hexagonal hole or three jaw chuck can be) Driven sleeve is used, can be the original hexagonal side after installation on size into square size, which can be used for the installation of the sleeve, is a good accessories to convert Package included: 3pcs x hex socket bits Note: Please allow 1-5mm errors due to manual measurement Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same Package included: 3pcs x hex socket bits