Description
- 1. Twist drill from the tip to the direction of the handle gradually reduce the diameter of the reverse cone to reduce the drilling between the guide part of the hole and the friction between the hole, the spiral groove can be used milling, grinding, hot or hot extrusion Method of processing, the tip of the drill through the blade after the formation of cutting part
- 2. The drill bit has a spiral groove and the formation of the front without grinding; drill edge of the edge of the role of good, the axis is not easy to skew; cutting, double-blade symmetry, force balance,
- 3. Suitable for drilling a lot of material. Precise grinding from hardened and tempered materials can be re-polished and used multiple times.
- 4. Provide a storage box that is easy to access, organize and portable, and can be easily stored in any toolbox, pocket or kitchen drawer.
- 5. The project is 13 twist drill, the other items shown in the picture are not included.
13 pcs Twist Drill Size 1.5 mm,2 mm,2.5 mm,3 mm,3.2 mm,3.5 mm,4 mm,4.5 mm,4.8 mm,5 mm,6 mm,6.5 mm Package Orange plastic box, you can carry at any time, convenient and affordable Feature Use once,Can be re-polished,Re-use
