Usage Tips:[Size of Carbide Cutter]: Industry Standard 15mm(L) x 15mm(W) x 2.5mm(T)with 4inch Face Radius R100mm, 4 indexable cutting edges, 30 degree cutting bevel. Each insert can be rotated up to three to a sharp edge, no more changing and resetting knives time a blade gets dull. [Carbide Inserts Application]:These indexable carbide inserts fit for byrd shelix spiral/helical planer cutter heads, or full-size wood lathe turning rougher. Offers quick, efficient cuts. [Affordable and Durable]: carbide Inserts made by K10 solid tungsten carbide, double life-time than general carbide , and increased 30% hardness. They are , stability, durable and long-lasting inserts you can count on over time. [ Finish]: inserts had been high precision , which increased the oxidation resistance and corrosion resistance of the cutter, they can a superior finish and is much quieter during operation. Material:Carbide colour:Silver Package Contents: 10 x 15 x 15 x 2.5mm R100 square replacement carbide 10 x professional M6 screws Only the above package content, other are not included. Note: Light 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.