The Bosch GBH18V-21N is an 18V SDS-plus Bulldog rotary hammer designed for heavy-duty drilling and hammering tasks. The tool only includes the Bosch model specifically for professional use, featuring a 3/4" bit size for increased versatility in drilling applications. Known for its high quality and durability, the Bosch brand ensures reliable performance in various construction and industrial settings. This rotary hammer is a powerful and efficient tool for professionals looking for precision and performance in their drilling and hammering needs.