Stone Drill Bit Set 4-12mm Diameter Rotary Hammer Drill Bits With Case For Concrete For Stone For Brick Feature:1. Effectively Remove Waste: The masonry drill bit features double pits, double grooves, and round handles, it can effectively remove waste2. YG8C tungsten carbide tip: YG8C tungsten carbide tip can ensure fast and simple drilling and long service life3. Drilling Various Materials: The drill bit is very suitable for drilling concrete, masonry, stone, brick and other construction projects4. 9 Drill Diameters: There are 9 drill diameters, including 4mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 8mm, 10mm, 12mm, to meet your different needs5. With storage box: equipped with storage box, which is easy to store and convenient to carrySpecification:Item type: masonry drill bit setMaterial: yg8c+40crPurpose: electric hammer drill bit setDrill bit diameter: approx. 4mm/0.16in5mm/0.2in5.5mm/0.22in6mm/0.24in6.5mm/0.26in7mm/0.28in8mm/0.31in10mm/0.39in12mm/0.47inUsage scenarios: bricks, masonry, concrete, rocks, tiles, cement, etc. Package List: 9 x Masonry Drill Bit1 x Storage Box 1) We accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow. 2) Payment must be made within 3 days of placing the order. 3) If you can't check out immediately after the auction ends, please wait a few minutes and try again, payments should be completed within 3 days. About Shipping 1.