cimsfcor New Four Flute Sawtooth Eccentric Drill Bit, High Strength Eccentric Twist Drill Bit Set with 6.35mm Hexagonal Shank for Wood Marble Metal Glass Wall Tile (Yellow,5/5/6/6/6/6/8/8/10/12MM)

• New 4-Flute Serrated Eccentric Drill Bits: Drill and tap in one step with this set of high performance drills, dramatically increasing the efficiency of your projects. Each bit has a titanium coating for strength and heat resistance, ensuring long-lasting sharpness and extended use
• 2 Sizes Available: Available in 2 sizes, Size 1: 3/4/5/6/8/10/12MM; Size 2: 5/5/6/6/6/6/6/6/8/8/10/12MM, no matter how big or small the task is, you can use the right drill to complete it
• Drilling instructions: low-speed use of the drill, the first light pressure to locate the location of the hole, slowly - accelerate the drilling speed of the drill to start drilling, drilling to the object 1/2 should lift the drill and then continue to drill deeper and more favourable to heat dissipation and chip removal, strengthen the durability of the cutter head, enhance the life of the drill bit
• Drilling instructions: low-speed use of the drill, the first light pressure to locate the location of the hole, slowly - accelerate the drilling speed of the drill to start drilling, drilling to the object 1/2 should lift the drill and then continue to drill deeper and more favourable to heat dissipation and chip removal, strengthen the durability of the cutter head, enhance the life of the drill bit
• Unique Thread Cutting Capability: This set of drills features a unique thread-cutting design that accurately produces clean, smooth threads, reducing the need for additional tools or procedures

Features: Staggered serrated high speed drilling (easy to locate the drill). Hexagonal shank design (6.35mm) High hard alloy 4-flute serrated eccentric ceramic drill, wood, marble, metal, glass, wall tile, concrete can be drilled. Working Principle:When the drill alloy eccentric tip starts to rotate easy to locate the drilling object the main cutting edge and the secondary cutting edge start to work to form a unique cutting trajectory. Specification: Size 1: 3/4/5/6/8/10/12MM Size 2: 5/5/6/6/6/6/6/8/8/10/12MM Colour: silver, yellow RPM recommendation: 800-1000rmp Low RPM Notes: 1. The same as the case of adding water, because of the water cooling protection, can enhance the service life of the drill. 2. less than 24V lithium drill is not recommended to use, the force is too small to hit in. 3. High hardness materials need to be cooled down by adding water, otherwise the drill bit will be burned. 4. Can't hit the steel bar during the process, it will cause edge chipping.