1. [Package Included]: Our package includes 8 most commonly used size guides, 2 locking nuts and 1 template guide adapter, the outer diameter specifications include 10/12/14/16/18/20/24/30 mm, which can meet your different needs 2. [Designed for]: This router bushing guide kit allows complete flexibility between router bit tools and various templates; ideal for cutout work, dovetail joints, hinge routing and more 3. [Brass Construction]: Our router guides are made of carefully selected brass material, which is higher in strength and not easy to deform or break, ensuring maximum durability for long-term use 4. [Storage Box]: This template guide bushing kit comes with a black storage box, each compartment has a size label for quick identification, convenient classification and storage, and easy access