1、The storage box can be used in splicing, and there are interfaceons on the left and right sides of the product. 2、The storage box can be spliced and used according to the situation, which is simple and convenient. 3、The milling cutter has the ability to resist chip removal, which makes the cutting smoother and does not stick to the knife. 4、The blade is covered with a coating to finely process the hot material for high‑speed roughing, reducing the number of tool changes. 5、The use of a new type of superfine steel particle material has high wear resistance and strength, with high‑speed cutting and crushing characteristics of the bidirectional milling cutter. Item Type: ER20 Collet Chuck Product Material: Plastic + steel Product Model: ER20 chuck milling cutter storage set Specifications: The set includes 10 x milling cutters, 16 x ER20 chucks, 1x storage box. Application Scope: Suitable for copper, stainless steel, alloy steel, tool steel, quenched steel and tempered steel, carbon steel, cast iron, heat-treated hard steel Size: Approx. 70mm / 2.8in 220mm / 8.7in 200mm / 7.9in 16 x ER20 Chucks 1 x Storage Box 10 x Milling Cutters