TCGX 1.81.51 LH Carbide Insert- XC899 ~ ISO insert number is TCGX090204-LH. ~ I.C. is 7/32". ~ L is .378. ~ S is 3/32". ~ d is .098. ~ r is .016. ~ LH Chip-Breaker is more suitable for machining aluminum alloy with larger cutting depth and higher feed rate.