UNIVERSAL - Universal driver's 1/4-inch hex shank easily snaps into electric screwdriver. Suitable for 1050w power above impact drill. Large capacity, it can be used for pieces in diameter from 0.8mm to 8mm. KEYLESS DESIGN - Chuck holds round shank drills securely. EASY ON AND OFF - Easy to use and install, conveniently, safely and quickly, keyless chuck converter to go from pipe to drill in seconds. ONE HAND DRILLING - Gives you the freedom of one hand drilling and is ideal if you are working in tight spaces. Tighten with one hand with the exclusive single sleeve design. Easily locks and releases drills, convert quickly change your hex driver into a drill. A PERFECT ACCESSORY - Turn any 1/4 inch cordless electric screwdriver into a drill or grinder to quickly change jobs and get the job done. Mainly used in Automotives, Garages, Warehouses, Offices, Home and etc. features: Specifications: Material: Aluminum alloy The color: black Hex shank: 1/4 inch (6.35mm) Capacity: 0.8mm ~ 8mm THE PACKAGE INCLUDES: 1 Chuck