Feature: 1. WEAR RESISTANT MATERIALS: Made of excellent brass, these bushing guides are designed for long term use and superior durability to resist wear and tear during prolonged woodworking 2. SCIENTIFIC DESIGN: The bushing brass router template bushing guide kit is simple and scientific in design to improve woodworking accuracy, consistency and durability 3. HIGH ACCURACY: These brass bushed guides are designed for mounting routers with cable type bases, ensuring accuracy and stability, resulting in improved overall smoothness and efficiency for woodworking tasks 4. MORE SIZE GUIDE BUSHING: This brass bushing router template guide bushing is equipped with eight kinds of guide bushing size, range of 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 24mm, 30mm 5. WITH ACCESSORIES: Brass router template guides set with locking nut, adapter, storage box, this variety can meet the needs of different woodworking projects Specification: Item Type: Brass Router Template Guides Set Material: Brass Specifications: 10mm Inner Diameter: 1/4in, Outer Diameter: 5/16in 12mm Inner Diameter: 9/32in, Outer Diameter: 3/8in 14mm Inner Diameter: 11/32in, Outer Diameter: 7/16in 16mm Inner Diameter: 13/32in, Outer Diameter: 1/2in 18mm Inner Diameter: 17/32in, Outer Diameter: 5/8in 20mm Inner Diameter: 21/32in, Outer Diameter: 3/4in 24mm Inner Diameter: 5/8in, Outer Diameter: 54/64in 30mm Inner Diameter: 7/8in, Outer Diameter: 1in . Package List: 8 x Bushing Guide 2 x Locking Nut 1 x Adapter 1 x Storage Box