- 99616-16-25R: Front and chamfering in one tool.- 99616-16-30R and 99616-25-40R: Front and back corner rounding in one tool.- Corner Radius from R1.0~R3.0. (0.039"~0.118").- Cost saving! Inserts are interchangeable on same holder, 4 cutting edges.- Optimizes the tool performance and reduce cutting time.- Tool offset can be set after measuring tool length by tool presetter or Z-Zero setter.- Coated carbide insert for excellent tool life.