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 DESCRIPTION1/2in (13mm) keyless drill chuckSuitable for drills up to 13mm (1/2in) Chuck capacity for drills from 2mm – 13mm1/2in x 20 UNF female thread mountingSuitable for all drills including air, electric, cordless etc... Perfect for replacing broken or damaged chucks or upgrading from a keyed chuckKeyless 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 adapterSDS ADAPTER DESCRIPTIONThis adapter enables an additional chick to be fitted to an existing SDS chuckSuitable 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 threadSDS plus shank with male threadThis adaptor enables the use of a normal standard key or keyless chuck to be used with a SDS drillManufactured from CR-v steel for maximum strength and durabilityScrew in the bottom for safely attaching the chuck to the adapter and prevent it from spinning off.