Hardened drop forged steel Hex chisel with shot blast finish. For general breaking up and demolition work. Can be used on all masonry, stone, brick and concrete. 29mm hex shank. Compatible with Silverstorm 1500W Electric Breaker (263570). Hardened drop forged steel Hex chisel with shot blast finish. For general breaking up and demolition work. Can be used on all masonry, stone, brick and concrete. 29mm hex shank. Compatible with Silverstorm 1500W Electric Breaker (263570).