... processing car, motorcycle engine parts, pistons, alloy wheels, motors, silver jewelry, optical parts, aerospace PCD InsertsMade by GE from the US ... processing car, motorcycle engine parts, pistons, alloy wheels, motors, silver jewelry, optical parts, aerospace, precision machinery and other difficult materialsMATERIALS RECOMMENDED ... Carbide30-500.10-0.150.2-0.3 CBN/PCD Diamond inserts(SPGN)