Milwaukee 48-62-6048 SDS-PLUS SLEDGE 1/4” Mortar Knife Our Milwaukee 48-62-6048 SDS-PLUS SLEDGE 1/4” Mortar Knife stays sharper longer. Reinforced edges deliver maximum durability and reduced wear over the life of the chisel. Weve engineered our chisels to maintain sharper edges for increased productivity and maximum life. No re-sharpening or re-hardening is necessary, reducing downtime. Our MILWAUKEE® SDS Plus SLEDGE™ Chisels are designed for SDS Plus rotary hammers with high grade forged steel for maximum durability and longer life in concrete demolition over our standard chisels.