Bosch 1 8 in Carbide Tipped Roundover Router Bit Lawn Mowers Gas with durable 1680 denier material and with durable 1680 denier material and an impact and water resistant molded base Specification Details Item Weight 158 with superior wear resistance Roundover bit – smoothly radiused edges on boards and panels requires little or no sanding before applying finish Compact ball bearing pilot – guides bit along edge of material Reinforced shanks – feature fully hardened and tempered steel shanks that provide ultimate durability Upgraded micrograin carbide – engineered for precise cuts and for long bit life Bosch exclusive heat treating process – provides hardness and withstands high temperatures Comprehensive line of bits – features hundreds of profiles for mortising surface forming