glovesOcun - Crack...
Material 60% Polyamid 30% Syntetic rubber 10% Polyester
Most holds require an M10 screw in their centre. It is the main fixation point of the climbing hold. Spax screws are then used at the borders of the hold to prevent rotation. When choosing M10 screws, make sure they are long enough, a good rule is that the pice sticking out should be around 2 finger width long.