Hardened drop forged steel SDS Max chisel with shot blast finish. For general breaking up and demolition work. Can be used on all masonry, stone, brick and concrete. 18mm round shank. Compatible with all SDS Max machines. Hardened drop forged steel SDS Max chisel with shot blast finish. For general breaking up and demolition work. Can be used on all masonry, stone, brick and concrete. 18mm round shank. Compatible with all SDS Max machines.