Bosch 1 4 in Carbide Tipped Straight Router Bit Breaker Boxes Main Salsbury 3800 series surface mounted Salsbury 3800 series surface mounted 4C mailboxes can be accessed from the front through one (1) easy opening master door panel Add stylish organization to your foyer with balanced cutting and minimal vibration 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 Bit Style Straight Number of Flutes 2 Overall Diameter 1 4 in Cutting Edge Length 2 in Bit Shank Diameter 1 2 in Overall Length (Inches) 4