Product overview A 4-piece collet adapter set for router and engraving bits that lets you use multiple bit diameters with the same spindle or chuck. Made from carbon steel for durability, each adapter provides a precise clamp so bits stay secure during operation. Key benefits Solve compatibility gaps: Change bit diameters quickly without buying new collets or tools, so you can work with more bit types and sizes. Reliable hold: Precise clamping reduces bit slip and runout, improving cut consistency and reducing rework. Built for repeated use: Carbon steel construction offers wear resistance and the flexibility needed for frequent bit changes. Saves time and cost: Use one router or engraving spindle for more tasks, reducing downtime and the need for extra tool holders. What’s included Four collet adapters in common sizes, including 12 mm → 6 mm, 12 mm → 10 mm, 7 mm → 6 mm, and one additional adapter (4-piece set total). Compatible with a variety of engraving machines and bit tools. Material and performance Material: Carbon steel for toughness and wear resistance. Clamping: Engineered for a stable grip and precise clamping force to keep bits secure during normal operation. Durability: Designed for long-term use across different applications without rapid deformation or wear. Compatibility and use Compatible with many engraving machines and bit tools that accept collet-style adapters. Suitable for both professional workshops and DIY projects where multiple bit sizes are required. Practical use scenarios Woodworking: Quickly adapt your router to accept smaller-diameter bits for detailed edge work or inlay cutting without swapping the whole collet assembly. Sign-making and engraving: Secure small-diameter engraving bits for fine detail work on wood, plastic, or soft metals. General repair and prototyping: Use the adapters to test different bit sizes or reuse existing bits across different machines when a matching collet is unavailable. Why customers choose this set Immediate compatibility extension for existing machines Strong, repeatable clamping that reduces bit wander and improves finish quality A simple, cost-effective way to increase the versatility of your router or engraving setup Notes This is a 4-piece adapter set with the sizes listed above. Check your machine’s spindle specifications and the bit shank sizes before use to ensure compatibility.