rlife The store is right for you! If you are not satisfied with the product, please contact me first and do not leave negative feedback lightly. < p>Thank you, have a nice day Quality shops are at your service! rlife Three-bit design: The three-point angle is better centered, will not shift, and can be drilled and produced quickly. High carbon steel material: strong deterrent, high hardness, good wear resistance and durable. Size: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, the number on the drill bit is easy to identify. Particularly suitable for sleeve countersunk holes or pilot hole drilling. By loosening and tightening the set screw with a wrench (supplied with the goods), the depth of the sub-sleeve and the drilling depth of screws of different lengths can be easily adjusted. It is recommended to use a hole punch for positioning before drilling and keep the drill vertical to prevent it from bending or breaking. The wide range of applications is ideal for plastic, PVC, rubber, chipboard, hardwood or wood floors, etc. Concrete drilling tools for professional processing of concrete, masonry and lime sand sine The high-performance drill bit has durability and good strength, which can Thoroughly remove drill chips. Note: Do not use a hammer drill. It is recommended that the clamping range of the electric drill should be less than 10mm. Use the drill within the clamping range Tool handle type: round handle Outer blade tip angle (): three points < p> Material: high speed steel Category: Straight shank twist drill bit Model: 7-piece three-point countersunk head drill [blister] Shop Tips: 1. The size is manually measured, please allow the error (1-3cm). 2. Due to different monitor pixels, there may be color difference, please refer to the actual product. 3. After receiving the package, if there is any dissatisfaction, please contact me first, do not leave negative feedback easily, thank you and have a nice day. becomeveryrich