Package Included:<br />1 x Tungsten Carbide Rotary Burr Drill Bits Set<br />1 x Box<br /><br />Features:<br />Material: Tungsten Carbide<br />Case Size: Approx.10x6cm/3.94x2.36"<br />Shank Diameter: 3mm(about 1/8")<br />Hardmetal burrs used in pneumatic or electric tools， speed is 6000-40000 rpm， must clamp tool<br />From right to left direction of cutting uniform movement， not like the use of wheel for reciprocating cutting<br />Be careful not to overexert (pressure is generally not more than 4kg)<br />Tungsten steel Solid Carbide Burrs for DIY enthusiast or hobby and craft fan， and give your rotary tool even more functionality with this set of burrs