Keyless Design: Chuck securely holds round-shank drill bits Keyless chuck finger-tightenss for easy bit changes Unlimited Use in Automotives, Garages, Warehouses, Offices, Homes etc. Easy On and Off: Keyless chuck converter to go from driving to drilling in seconds Specifications: Color: Black | Shank: 1/4" | Clamping Range: 1/32" - 5/16" (0.4mm - 8mm) | Thread Mount: 3/8 - 24 | Overall Length: 2-3/8" | Chuck Dimensions: 1-3/8" length x 1" Dia | Shaft Length: 1"

Superior Electric J016 Mini (0.5 to 8 mm) Keyless Drill Chuck with 1/4" Hex Shank Adapter. Use this chuck to convert any cordless screwdriver that has a 1/4 " hex drive into a drill or grinder.