KM™ Quick Change External Threading, Grooving, and Cut-Off Catalog Numbering System How Do Catalog Numbers Work? Each character in our catalog number signifies a specific trait of that product. Use the following key columns and corresponding images to easily identify which attributes apply. KM63TSNER3 KM 63 TS N S KM System Feature Insert Insert Quick Size Holding Method Location Change 40 = 40mm TS WGM E = End mount 50 = 50mm XMZ S = Side mount 63 = 63mm ATC R = Angle mount 80 = 80mm 4X 100 = 100mm WMT™ SLS E CSMS B S ProGroove™ N R TopGroove™/TopThread™ clamping LS Laydown A30 WWW.WIDIA.COM