Computer balance, running at more than 22,000. Free from attack "Soften" sharp edges of milling dies, doors, drawers and any wooden parts. Most of adopt unique and are-. Rout hardwood, cork, plywood and composites Router for numerical control, handheld and desktop installation Titanium-containing ground cemented carbide with long service life. Colour:As Shown Material:Tungsten steel alloy Size: diameters are6mmx25.4mm,6mmx28.62mm,6mmx31.74mm,6mmx34.9mm,6mmx38.1mm,6mmx41.28mm Package Contents: 1sets * drill bits with different sizes(6mmx25.4mm,6mmx28.62mm,6mmx31.74mm,6mmx34.9mm,6mmx38.1mm,6mmx41.28mm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.