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HHIP 80 Degree trigon carbide insert is perfect for light roughing of steel and stainless steel material. Special chip-breaker with a very tough cutting edge that can reduce cutting force. ISO insert number is WNMG080404DR. I.C. is 0.343. L is 0.343. S is 3/16. d is 13/64. r is .0157. Made of thick TiCN and Al2O3 coating which has a high anti-plastic yield and cutting edge strength and is a preferred universal grade from steel finishing to roughing. It holds steady in tough cutting conditions and can be used for dry-cutting. The cutting speed can increase more than 25% under the same cutting conditions and they will last 30% longer at the same cutting speed.