Feature(may vary by option.)

●【Durable & Long-Life with Top Quality】M35 Cobalt High Speed Steel (5% Cobalt) with TiAlN Coating makes our center drill bit much harder, more wear-resistant, heat-resistant and durable. Arc-shaped root of the drill bit tip reduces the risk of breaking greatly.
●【Cut Precise Holes Efficiently】Sandblasting passivation surface treatment and fully ground body process ensure more accurate and smooth drilling. Arcuate spiral groove provides excellent chip removal and heat removal. 118° split point prevents walking and makes drilling precise and faster.
●【Wide Application】Perfect for drilling center holes with most lathe machines and power drills in Stainless Steel,Hardened Steel, Carbon Steel, Alloy Steel, Cast Iron, Aluminum, Copper, Wood and other hard metals.
●【5 Sizes Fit All Needs】Includes 6pcs centering drill bits with 5 most commonly-used sizes, #1 3/64"(*2), #2 5/64", #3 7/64", #4 1/8", #5 3/16". These lathe bits can be used for processing materials with diameters of 3/16(5mm)~5"(130mm).
●【90 Days Warranty & Storage】If you are not fully satisfied for any reason, please contact us for 100% refund or replacement. This drill bit set comes with a portable plastic case for easy storage and organization.

[1mm-5mm(6pcs)]