wood auger bits

Product Description1.Material: 40Cr or 45 steel2.Surface finish:bright ,TIN-COATED,etc3.Diameter:3 to 40mm4.Overall Length:65 to 300mm5.drill bit sets are availableIntroduction1) Made of high carbon steel with threaded tip.2) Screw threaded centre point for precisely locating the bit and for fast self-starting of the hole.3) Single outer cutting spur for splinter free drilling and clean holes.4) Wide lands keep bit straight as it bores through the hole.5) Full length heat