Faithfull Chuck Keyless Impact 10mm Capacity 3/8 x 24 UNF FAICHUCK38K Keyless chuck for use on mains powered, cordless drills and drill drivers. Quick and easy to use, these chucks can be operated by hand for fast bit changes. Capacity 0.8 -10mm 3/8in x 24 UNF thread. Suitable for use on rotary drills and drill drives. FAICHUCK38K