High performance reversible and indexable replacement round diamond square carbide inserts have 4 cutting edges. Designed for numerous spiral/helical planer cutter head system, wood lathe tools. High strength and hardness.Easy to use, not easy to rust.Durable in use. Easy to replace your jointers and planers, excellent accessory for wood turning work. Apply for general purpose wood, chipboard, plywood, MDF/HDF. Shape: Square, Round, Diamond Square: approx. 15*15*2.5mm Round: approx. 15*2.5mm Diamond: approx. 10*28*2.5mm (with sharp point) Material:alloy colour:Silver Package Contents: 3 * Carbide Insert Only the above package content, other products are not included. Note: Light shooting 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.