Precise Cuts Every Time:1/4 inch Shank, teeth width: 1/4 inch, teeth depth: 1/4inch, Overall Diameter: 1-3/8 inch. The wood router bits are very sharp, which ensures that you end up with clean, smooth and flawless woodwork results every time, truly versatile for your extra convenience. Rugged and Sharp Router Bits - Unique design, durability and impact resistance ensure the sharpness of the alloy blade. Balanced craftsmanship and a solid hardened steel board with anti-recoil and build-up & heat resistant teflon coating which can withstand some heavy duty use and the test of time. Use Of Safe - The 1/4 inch shank and an anti-kickback design provide greater stability and less vibration during use. keeping to 2/3's minimum in the colletthe short clamping of this product might cause bend. Widely Applications - Use these tongue and router bit tools to enhance your hardwood work performance and create beautiful handmade furniture yourself. suitable for woods, MDF, particle board, plywood compact panel. Ideal for kitchen and bathroom doors, office cabinets, floor tables, bedroom shelves, outdoor frames, walls and more. Please avoid cutting ferrous metals and other materials such as steel, iron, sand, etc. Safe Operation - Designed for a router table or desktop woodworking engraving machine like CNC hand-held and table-mounted portable router. Please make sure that the Router Bit and router table connections is tight and avoid loosening and causing it to throw out. If you have any problem, please contact us any time.