MB-81 - Tungsten Carbide-Tipped Road-Planing Bit Tungsten carbide tipped road-planing bits are designed to fit your planers. Select this style planing bit for your removal applications on concrete or asphalt surfaces. Specfications Specfications Dimensions – .31″ / .75″ / .55″ / Length: 2.50″Weight – 0.15 lbs (0.07 kg)Materials – SAE steel, tungsten carbideTip Shape – Pointed cylinderNumber of Points/Edges – 1Shaft Size – Fits CM-01 or similar holder