The ANGLED ROUND TOOLHOLDERS position the insert at 30°, 45° or 60° angles for reliefs, undercuts and angled OD and face grooves. Round shank sizes are available in diameters of 1/2”, 5/8”, 3/4”, 1”, 20 mm and 25 mm. The ANGLED ROUND TOOLHOLDERS are for use with THINBIT® inserts in grades for ferrous and non-ferrous materials.