5 mm Head length L1: 25 mm.Screw-on toolholder set 25 mmStandard: DIN ISO 5610 ISO code toolholder: SCLCR 2525M12, SDJCR 2525M11, SSSCR 2525M12 suitable indexable insert: CC 1204, DC 11T3, SC 1204 Functional width L4: 32 mm Head length L1: 20 mm Head length L1: 21.