1. With the body made of 40 chrome steel, the head welded by YG8C alloy, this Drill Bit is very solid and durable. 2. The cutting edge is very sharp, making hole drilling process become very easy and convenient. 3. Straight shank design, suitable for electric hammer Only. 4. Applicable to drilling concrete, masonry and other materials. 5. Six sizes, namely, 6mm / 0.24inch, 8mm / 0.31inch, 10mm / 0.39inch, 12mm / 0.47inch, 14mm / 0.55inch, 16mm / 0.63inch; length: 160mm / 6.3inch. Specification: Condition: 100% Brand New Item Type: Drill Bit Materials: 40 Chrome Steel + YG8C Alloy Quantity: 6Pcs Package Weight: 410g Length: 160mm / 6.3inch Six Sizes: 6mm / 0.24inch, 8mm / 0.31inch, 10mm / 0.39inch,12mm / 0.47inch, 14mm / 0.55inch, 16mm / 0.63inch Package Included: 1 x Drill Bit (6mm) 1 x Drill Bit (8mm) 1 x Drill Bit (10mm) 1 x Drill Bit (12mm) 1 x Drill Bit (14mm) 1 x Drill Bit (16mm) Features & details Materials: 40 Chrome Steel + YG8C Alloy Six Sizes: 6mm / 0.24inch, 8mm / 0.31inch, 10mm / 0.39inch,12mm / 0.47inch, 14mm / 0.55inch, 16mm / 0.63inch . Applicable to drilling concrete, masonry and other materials. The cutting edge is very sharp, making hole drilling process become very easy and convenient. With the body made of 40 chrome steel, the head welded by YG8C alloy, this Drill Bit is very solid and durable.