3pcs Drill Adapter Socket Adapter Drill Bit Set Hex Chuck 1/4" 3/8" 1/2" Wrench Sleeve Belt Expansion Power Drive Tool Features:1. Stainless steel lock for a secure fit2. Snap sockets tightly and won't slip off 1/4 inch3. Hexagonal shank prevents stripping when working at high speeds4. Super strong heat treated chrome vanadium stainless steel for normal skin and effect5. Use-sandblasted finish6. Converts drills to high-speed socket controllers7. Applicable to screwdriver chuck or electric screwdriver tools (hexagonal hole or three jaw chuck can be)8. Driven bushing is used, it can be the original hexagonal side after installation into size to square, which can be used for bushing installation, it is a good addition for conversion Specification:Material: chrome vanadium stainless steel cr v Dimension: (Approx.) 1/4" x 1/4" x 50mm-1/4" shank can be made into 6.35mm square 3/8" x 1/4" x 50mm-1/4" shank can be made into 9.53mm square 1/2" x 1/4" x 50mm-1/4" shank can be made into 12.7mm square Color: as the picture showsNote: Please allow 1-5mm errors due to manual measurement3 pcs. Hex bits