Material: YG8C alloy, 40CR steel. The SDS PLUS drill bit is ideal for drilling holes in concrete, brick, stone, and masonry. Wider and deeper U-shaped flute design allows for quick debris removal, reduces stress during drilling, keeps the bit cooler, and extends bit life. Special groove design improves drilling torque and hammering efficiency while preventing slippage. Compatible with most electric and cordless hammer drills. Designed for drilling in concrete, brick, stone, and masonry walls. The SDS Plus shank fits most rotary hammer drills on the market, meeting a wide range of drilling needs. The SDS chisel is designed for use with electric hammer drills for concrete, brick, stone, masonry, and wall applications. Package includes: 8 hammer drill bits and 3 chisels. Specifications: round shank hammer drill bits 5x110mm, 6x110mm, 8x110mm, 6x160mm, 8x160mm, 10x160mm, 12x160mm, 8x160mm. Round shank chisels: 14x160mm (pointed), 14x160mm (flat), 14x160x40mm (wide).