Description: Universal: Universal driver 1/4-inch hex shank snaps easily into the power screwdriver Keyless Design: Chuck securely holds round-shank drill bits Easy ON And OFF: Keyless chuck converter to go from driving to drilling in seconds One-Handed Drilling: Gives you the freedom of one-handed drilling and is ideal if you’re working in tight spaces An Ideal Accessory: Turns any 1/4 Inch cordless power screwdriver into a drill or grinder to quickly switch tasks and keep the job moving Specification: Color: black Material: aluminum alloy Driver Shank: 1/4 inch (6.35mm) Hex Shank Clamping Range: 0.3-8mm Overall length: 72mm (Approx.) Specific size as picture shows NOTE: It can NOT be used counterclockwise!! Package Included: 1 pcs Drill Chuck