3Pcs Impact Drill Socket Adapter Converter Set For To 1/4 3/8 1/2 Driver Specification: new Material: vanadium steel-v Dimension: (approx.) 1/4" x 1/4" x 65mm--1/4 "shank can be converted into 6.2 mm 3/8" x 1/4" x 65mm--1/4 "shank can be converted into 9.4 mm 1/2" x 1/4" x 72mm--1/4 "shank can be converted into 12.8 mm Color: as picture shows Features: Stainless Steel Locking Ball Ensures Secure Fit Sockets Tightly & Won't Slip Off 1/4-inch Hex Shank Prevents Stripping During High Speed Drill Operation Super Strong Heat Treated Vanadium Steel for Normal & Impact Use - sandblasted finish Converts power drills into socket drivers Applies to the screwdriver handle or electric screwdriver tools (hexagonal hole or three jaw chuck can be) sleeve is used, can be the hexagonal side installation on size into size, which can be used for the installation of the sleeve, is a good accessories to 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 hex socket bits