The scope of delivery is subject to the first picture, the other pictures are the display effect Three-bit design: the three-pointed 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 countersunk sleeve holes or drilling pilot holes. By loosening and tightening the adjustment screw with a wrench (included), 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 remove drill chips well. Note: Do not use an impact drill. It is recommended that the clamping range of the electric drill be less than 10 mm. Use the drill within the clamping range Tool handle type: round handle Outer blade tip angle (): three-point Material: high-speed steel Category: Straight shank twist drill Model: 7-piece three-point countersunk drill blister: Please allow a slight deviation in the measurement data and make sure you do not mind before ordering. High-quality store for you! Shop tips: 1. The size is measured manually, please allow the error (1-3 cm). 2. Due to the different monitor pixels, there may be some color difference, please refer to the actual product.