Features With the body made of 40 chrome steel, the head welded by YG8C alloy, this Drill Bit is very solid and durable. The cutting edge is very professional, making hole drilling process become very easy and convenient. Drill Bits Straight shank design, suitable for electric hammer Only,high strength, high cost performance. Drill Bits Applicable to drilling concrete, masonry and other materials. 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: 416g 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) Package List