Round threaded sleeve with M10 internal thread for climbing wall construction. It should be pre-drilled with a 13 mm drill as standard. The sleeve then has an outer diameter of around 13.2 mm and can be easily knocked in with a hammer and then fixed with 3 screws (screws not included). Depending on the hole pattern, between 25 and 35 pieces are required for 1 m² wall. For wooden panels with a minimum thickness of 14 mm, the optimal panel thickness would be 19 or 21 mm.