1. Material: aluminum oxide + nylon 2. Applicable: yachts, fishing boats, sailboats, kayaks, canoes, etc. 3. Strong nylon plastic base, wear-resistant, firm and not easy to slide 4. Convex gear design, better reduce the wear of cam and rope, and enhance the bite force of gears 5. Made of high-quality anodized aluminum, high strength, light weight, good wear resistance and durability 6. Size: 8.7x3.9 cm 7. Gear spacing: 15 mm 8. Weight: 83 grams