The carbide woodworking inserts have four cutting sides so the edges can be rotated to expose a new cutting edge when dull or chipped, resulting in very little down time and huge savings over conventional carbide cutters. 14*14*2-30°, 15*15*2.5-30°, 30*12*1.5-35 some standard size and customized size available for carbide indexable inserts. It’s becomes the first choice of the modern woodworking cutting tool for sharp cutting, smooth surface, strong durability, low noise and high strength.