1. Industrial-grade brass roller wheel ensures robust safety and stability
2. Dual-row six-point buckle for reinforced securing,with spring-loaded auto-locking mechanism to prevent loosening
3. Corrosion-resistant stainless steel shaft with internal spring mechanism for easy replacement
4. Polyester + nylon hybrid core weave for abrasion resistance and tensile strength, with nylon rope supporting up to 66.1 lb
