Metal washers will last longer time than plastic ones, and can be used as anti-slip.
The rubber material provides a secure grip, preventing loosening or wobbling of the toilet seat, ensuring a stable and safe seating experience.
The rubber grommets in the kit have a threaded section, so you can just push them into the holes in the top of the toilet pan. When you tighten the screw, it expands and tightens itself into the hole, without the need of a bolt on the other end of the screw.
Suitable for 14-16mm/ 0.55-0.63inch hole for toilet seat, universal fits.
Washer Material: metal Diameter: 14mm Color: silver
Feature: They are very easy to fit done in a matter of minutes, simply remove old bolts clean around the area and fit the new bolts. Supplied with 4 washers, when you tighten the bolts the washers crush down into the holes and you need to be careful you do not tighten the bolt so much it pushes through the washer.