The design principle of expanding wall plugs are well know as the expanding anchor. They belongs to the light or medium duty fixtures in the concrete place. To drill the hole according to the external diameter of plastic plug and insert it into the hole and take the fixing objects with the self-drilling screw to fasten the screw into the wall plug to expand the end and realize the anchoring and fixing purpose. As the screw sizes, the yellow wall plug is used 3.0 mm screw, the red wall plug is used 3.0mm -4.0 mm screw, the brown wall plug is 4.0 mm-5.0 mm screw. To drill a hole for red one is 5.5 mm, the yellow one is 6.0 mm and the brown one is 7.0 mm in the solid substrate. In the soft place, the hole diamter should be a little enlargened drilling bit diameter.
The good quality PE material are used to produce the plastic wall plug to ensure the good feature of them alongwith the professional design of two-way expansion function, the ribbed sides and the lips, which ensure the good anchoring and fixing strength and the safe installation operation.