Quality MaterialHigh strength keyless chuck made of HSS and ABS, very strong and durable, anti-abrasive, impact resistant. Size Range RangeThe chuck size should be adjusted between 2-13mm, suitable for 2-13mm drill bits. Easy To Use Just plug it in, hand-tighten your standard drill bit and you're done, ready to use standard SDS drill bits, it provides excellent smooth and smooth action and more. Strong SupportWith unique thrust bearing, delicate design, for strong grip just by tightening the chuck, tight and stable. RemovableThe adapter is removable, to replace it according to your needs, so you don't need to ask for an extra drill bit. Perfect for Bosch SDS, GSB and GSR, electric hand drill, hammer drill and more regular electric drill.