Through-hardened jaws, Durable gripping surfaces, For corded or cordless reversible or non-reversible power drills, Bit/Blade Mounting Size: 0, 078"" [Min] 1/2"", Finish: Ground-Bright Band, Housing Diam: 1, 600"", Key Size: KK, Mounting: Threaded 3/8-24, Type: Keyed Chuck, SKU: ORSNO17800