Hardened drop forged steel Kango chisel with shot blast finish. For general breaking up and demolition work. Can be used on all masonry, stone, brick and concrete. 21mm hex shank. Compatible with Kango K9 machines. Hardened drop forged steel Kango chisel with shot blast finish. For general breaking up and demolition work. Can be used on all masonry, stone, brick and concrete. 21mm hex shank. Compatible with Kango K9 machines.