Hardened drop forged steel with shot blast finish. Includes 20 and 40mm chisels and point. For general breaking up and demolition work. Can be used on all masonry, stone, brick and concrete. 15mm hex shank. Compatible with all SDS Plus machines including Silverline and GMC. Hardened drop forged steel with shot blast finish. Includes 20 and 40mm chisels and point. For general breaking up and demolition work. Can be used on all masonry, stone, brick and concrete. 15mm hex shank. Compatible with all SDS Plus machines including Silverline and GMC.