Professional Keyless drill chuck with SDS adaptor for commercial or occasional home use This listing is for both a keyless drill chuck and SDS adapter KEYLESS DRILL CHUCK DESCRIPTION 1/2in (13mm) keyless drill chuck Suitable for drills up to 13mm (1/2in) Chuck capacity for drills from 2mm – 13mm 1/2in x 20 UNF female thread mounting Suitable for all drills including air, electric, cordless etc... Perfect for replacing broken or damaged chucks or upgrading from a keyed chuck Keyless chick so ideal for quick drill change plus no need for chuck keys (that are easily lost or misplaced) Drill chuck can be used with or without the included SDS adapter SDS ADAPTER DESCRIPTION This adapter enables an additional chick to be fitted to an existing SDS chuck Suitable for all 1/2in (13mm) chucks keyed or keyless (including this one in the listing) Suitable for chucks with a 1/2in x 20 UNF thread SDS plus shank with male thread This adaptor enables the use of a normal standard key or keyless chuck to be used with a SDS drill Manufactured from CR-v steel for maximum strength and durability Screw in the bottom for safely attaching the chuck to the adapter and prevent it from spinning off