no, it's a cleat style. Similar to what you would see on a boat or boat dock. They are definatly plastic. I used to work in a plastic injection factory in college and appears to be made of a very strong type of plastic we would use sometimes. Strong but brittle.
Originally Posted by 4X2XLT
are they kinda a squarish U shape? cuz ive got those two and theyre jsut coated in a plastic/rubber substance... they are very stong though