The DEWALT 12" x 2" Scaling Chisel with SDS-Max Shank (DW5837) adds versatility to your rotary hammer so you can work confidently knowing that you always have the right tool for the job. Perfect for chiseling and chipping applications, this shank is compatible with all rotary hammers that accept 3/4 In. hex by 21/32 In. round shanks. The shank is precision manufactured with a fully hardened steel body, which delivers increased product life and durability, so you never have to worry about premature tool replacement.