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Bestgle 4Pcs 6mm(1/4”) Shank Tungsten Carbide Rotary Cutting Burr Die Grinder Bit for DIY Woodworking, Metal Carving, Polishing, Engraving, Drilling, 150-160mm Length: Industrial & Scientific. Buy Bestgle 4Pcs 6mm(1/4”) Shank Tungsten Carbide Rotary Cutting Burr Die Grinder Bit for DIY Woodworking, Metal Carving, Polishing, Engraving, Drilling, 150-160mm Length: Cutting Burrs - ✓ FREE DELIVERY possible on eligible purchases. Set of 4 Double Cut Solid Carbide Rotary Burr Set, Shank diameter: 6 mm(approach 1/4 inch), Cutting edge diameter: 7mm-10mm, Total length: 150-160 mm 。 The service life of tungsten steel rotary burr is 10 times longer than high-speed steel and 200 times longer than grinding wheel 。 High performance on processing Copper, Aluminum, Alloy, Iron, Marble, Jade, Steel, Glass, Wood and Plaster etc. machining hardness can reach to HRC70 。 Generally use with handheld electric or pneumatic tool drive (can also be used in machine tool). The speed of the electric or pneumatic tools usually is 6000-50000 revolutions per minute 。 Excellent for fine detail work,widely used for metalwork, tool making, model engineering, wood carving, jewelry making,welding, chamfering, casting, deburring, grinding,ect 。 Features。 √Made of Heat-Treated carbide which lasts long working life, sharp and durable。 √Double-cut style has rows of cutting teeth cut in two intersecting directions for fast material removal and a rougher finish。 √Easy to use, safe and reliable, can reduce labor intensity, improve the working environment. 。 √Ideal for cleaning up welds,grinding weld beads, shaping parts, smoothing rough castings, or porting cylinder heads。 。 Specification:。 Material: tungsten carbide。 Cutting edge diameter: mm, 8mm, 8.5mm, 10mm。 Shank diameter: 6mm(approach 1/4 inch)。 Total length: 150-160mm。 。 Package includes:。 4 x Tungsten carbide Rotary point burrs。