Genuine Bosch 1616328053 gear sleeve for compatible Bosch GBH cordless and corded SDS Plus rotary hammers, including the popular GBH 18V-20, GBH 180-LI and GBH 2-20 D models. This replacement gear sleeve forms part of the internal drive and hammer mechanism, helping transfer movement correctly between the associated components during drilling and hammer operation. Suitable for replacing a worn, damaged or faulty original gear sleeve and manufactured to the correct Bosch specifications for precise fit and reliable operation.