Screw post measurement: the screw post is composed of screw and top, screw size is 4 x 4 mm, while the top size is M5 x 5.5 mm, they are matchable and the total length is 6 mm
Hard material: this set of male and female screws is made of steel, hard, sturdy and durable, with nickel plated on the surface, not easy to get rust and erosion
Useful Screw post: this set of screw posts is easy to install, use a drill to punch a hole of 5 mm diameter, then you can install the 2 parts from 2 sides, they can bind different items
Quantity: this package includes 50 pieces of screws and 50 pieces of tops, enough for you to use
Note: small parts, please keep away from children; For a tight fit, your hole should be equal to or slightly smaller than the pin diameter (5 mm)