Feature●Grip range: 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, total 13 pieces.●➤Product material: Made of formulated spring steel.●Accuracy: 0.005●➤Application: Perfect for CNC routers, lathes and workpiece holders for engraving machines.●Features: It is made of hard steel, with high surface hardness, high wear resistance and long service life.Description