This set has a user-friendly design components ( male female hexagonal spacers) assemble easily with a hexagonal / screwdriver for secure connection Make of nylon and reinforced, resist, electrical shorts, and ensuring stable insulation for sensitive electronics This set suits electronics, motherboards, PCBs, robots, & other precisely projects Nylon Standoff set: Includes black nylon spacers, screws, nut, and threaded pillar standoffs in 13 sizes Spacers and standoffs screws are pre-sorted by length specification in a labeled compartment box for quick access and reduced installation time, Manufacturer: Kaeltsyn