HELIDO UPFEED H600 LINE - Moderate feed face mills carrying double-sided inserts with 6 cutting edges which can be applied at up to .138" depth of cut. MF, medium feed for higher depths of cut but slower feeds. High metal removal rate when combining high depth of cut with moderate feed. Most advantageous for machines with a limited table feed or heavy workpiece. The H600 WXCU 040310T insert has "I" marks on top rake for indentification.