Comprehensive Collection: This assortment is meticulously designed to fulfill the diverse needs of CNC engraving and milling machines, enhancing versatility and performance. Precision Engineered: Each collet in the ER11 set boasts a remarkable accuracy of 0.02 mm (0.0008 inches), making it ideal for precision tasks such as milling, drilling, and tapping. The high precision ensures consistent, reliable results across a variety of machining operations, contributing to superior work quality. Quality and Durability: Constructed from premium Metal, the collets offer exceptional durability and elasticity. This ensures a secure grip and stable cutting experience, which in turn boosts productivity and efficiency in demanding machining environments. Individually Packaged: For enhanced protection and convenience, each collet and nut is individually packaged in a robust plastic box, clearly labeled with its size. This thoughtful packaging prevents damage and loss, while also simplifying storage and retrieval in busy workshop settings. Versatile Use: Ideal for a wide range of equipment, the ER11 collet set is compatible with CNC machines, milling machines, engraving machines, and machining centers. The included hexagonal nuts can be used with various toolholders, reamers, tool bars, and other machining accessories, underscoring the kit's adaptability and utility. Size: ER11 1/8inch & ER11 1/4inch Material: Metal Color: As Shown Package Contents: 3 X ER11 1/8inch collet 3 X ER11 1/4inch collet 3 X ER11 clamping nut Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.