Expansion screws generally refer to metal expansion screws. In fact, there are plastic expansion screws, but they are not commonly used, so we generally think of them as metal. The wedge Angle is mainly used to fix the expansion screws, which can promote the friction holding force of the expansion screws.
Laibin Yuanhui Hardware Products Co.,Ltd is a professional factory that specializes the production of long screws, non-standard screws, titanium screws , small screws, stainless steel screws, etc.. We accept customers' design and any OEM & ODM designs.
And we have a great team to supply best quality, excellent services, specialized sales for our clients all around the world. Welcome to cooperate with us to reach your attractive prices and best services.