Concrete drill bits, hex shank, 3 pieces. Manufacturer: Unika, Cutting diameter (mm): 10.5, Overall length (mm): 505, Used a few times. There is a feeling of use, but the cutting edge is still in good condition. Manufacturer: Shinkoh Kogyo, 21.5mm, 505mm, Used a few times and has some rust, but the cutting edge is still in good condition as you can see. Manufacturer is uncertain, but (Super) Light Seiki? 17mm, 505mm, Unused. The cutting edge is clean as you can see. These are a set of 3. Price is 1,000 yen per piece x 3 pieces, plus shipping.