12pcs 7mm Nitride Titanium Coated High Speed Steel HSS 4341 Twist Drill Bits M8*23 D40*H20 * Used for shaping and

* Used for shaping and polishing kitchen knives

which are elastic

Under Head Length: 37mm / 1

Size: 220 x 55mm / 8

12pcs 7mm Nitride Titanium Coated High Speed Steel HSS 4341 Twist Drill Bits M8*23 D40*H20 * Used for shaping andSpecifications: Cutting Edge Diameter: 7mm 0. 276" Round Shank Diameter: 7mm 0. 276" Cutting Edge Length: 68mm 2. 68" Overall Length: 107mm 4. 21" Split Point: 135 Degree Material: 4341 High Speed Steel (HSS) Finish: Nitride & Titanium Coated (TiN Coated) Package: 12pcs x Twist Drill Bits Descriptions: 4341 high speed steel contains high content of carbon and alloy elements, providing excellent cutting performance, high heat resistance, high hardness,