Material: YG8C alloy, 40CR steel. The SDS PLUS drill bit is ideal for drilling holes in concrete, brick, stone and masonry. The wider and deeper U-shaped flute, cleans debris quickly, reduces stress when drilling, keeps the bit in good condition and makes the bit cooler, longer. Special groove design, improving drilling torque and hammering energy without skidding. Fits most electric or cordless drills. Purpose: dedicated to excavator walls. Suitable for drilling operations in ordinary stone, concrete, brick walls and other materials. The SDS Plus shank is suitable for most rotary drills on the market and meets most of your needs. The SDS chisel is the electric hammer drill for drilling concrete, brick, stone, masonry and walls. Package includes: 8 hammer drill bits and 3 chisels. Specifications: round shank electric hammer drill bits 5x110mm, 6x110mm, 8x110mm, 6x160mm, 8x160mm, 10x160mm, 12x160mm, 8x160mm. Round shank chisel: 14 x 160mm (pointed type), 14 x 160mm (flat type), 14 x 160 x 40mm (wide type).