Features - A set of 10pcs female and male skating screws for inline skating wheels - 31mm skating screw is ideal for front wheel replacement; 36mm skating screw is ideal for rear wheel and brake bolt replacement - Made of high-quality iron with coating on the connecting part for durability, strength, and resistance to loosening - Easy to install; compatible only with skating shoes that require male and female screw fittings on the wheels - Requires two 4mm hex keys with double ends for installation: one for fixation and the other as a tool to complete the task This package includes a set of 10pcs inline skate wheel screws designed for replacement use. Constructed from high-quality iron with a coated connecting part, these screws offer long-lasting durability and secure performance. They are easy to install and built for extended use. Specifications: - Condition: New - Material: Iron - Color: As shown in picture - Middle Part Length: 31mm, 36mm (optional) - Middle Part OD: Approx. 6mm - Top Hex Socket Diameter: 4mm - Package Weight: Approx. 91g Package Included: - 10 x Skating Wheel Screws Notes: - A length difference of 1mm will not affect functionality - Compatible with male and female nail skates; not suitable for single-head nail skates