Made of Carbide, providing you a better experience and durable use 14mm square straight carbide insert with 10pcs M6 * 10mm Screws,Designed for numerous spiral/helical planer cutter head system,wood lathe Tools Easy to replace your jointers and planers, excellent accessory for wood turning work. 4-Cutting edge(14mm lengthX14mm width X2.0mm Thick-30 * Cutting angle, and all are of the same sharpness If one knife edge is dull or nicked, just turn it to another edge which greatly reduces you down time. Color: Silver Material: Carbide Package Contents: 10*Carbide Cutter 10*M6 10mm Screws Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.