ER11 Collet Set for Milling Machines and Engraving Tools Designed for professionals and enthusiasts, this ER11 collet set is intended for milling machines and engraving tools. It provides strong clamping force across a wide range of sizes, enabling precision in varied applications. ER11 Spring Collet Set expands your machining capabilities with a broad size range and precise gripping, improving consistency and craftsmanship. The collet chuck features a unique concave design that reduces iron debris interference with tool holder accuracy. With hardened construction, it offers hardness and toughness and resistance to deformation and cracking. Compatible with milling machines and engraving tools that use ER11 collets; suitable for a variety of cutting tools and shanks. Practical uses include home renovations and industrial projects, with versatility across metal, wood, and composite materials. Use scenarios Milling small features in aluminum or brass using different end mills to achieve stable cuts and reduced runout. Engraving or precision marking on metal or plastic where secure tool retention is critical. DIY woodworking or metalworking tasks such as trimming, drilling, or small pocketing operations on cabinetry, profiles, or extrusion work.