The GFMR 2525 M 0413R 034021 is produced by Pramet and is described as a Pramet GFMR 2525 M 0413R 034021 6760416 Turning Toolholder - Axial Grooving Top clamp grooving tool for holding a 12.6mm long double or single ended insert with 4mm cutting width (designation LCM. 0413.. ), right handed with insert parallel to the shank for a maximum grooving depth of 20mm, shank height 25mm, width 25mm and tool length 150mm with a clockwise curved blade for face grooving and turning, initial plunge diameter between 21 and 34mm