3Pcs Impact Drill Socket Adapter Converter Set For To 1/4 3/8 1/2 Driver Specification: newMaterial: vanadium steel-v Dimension: (approx.)1/4" x 1/4" x 65mm--1/4 "shank can be converted into 6.2 mm3/8" x 1/4" x 65mm--1/4 "shank can be converted into 9.4 mm1/2" x 1/4" x 72mm--1/4 "shank can be converted into 12.8 mmColor: as picture showsFeatures:Stainless Steel Locking Ball Ensures Secure FitSockets Tightly & Won't Slip Off 1/4-inchHex Shank Prevents Stripping During High Speed Drill OperationSuper Strong Heat Treated Vanadium Steel for Normal & ImpactUse - sandblasted finishConverts power drills into socket driversApplies 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 toPackage included:3pcs x hex socket bitsNote:Please allow 1-5mm errors due to manual measurementItem color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated samePackage included:3pcs hex socket bits