A massive 40kN WLL in such a small form - the DMM Impact Blocks are designed by the Treemagineers and made in Wales by DMM. These superior Impact Blocks are made specifically for the high impact loads generated during tree rigging operations. Rope and webbing friendly rounded edges. Hot forged cheek plates in 6082-T6 aluminum for high strength-to-weight ratio. The top-mounted lightweight attachment sling makes for easy hauling into the tree (by your groundie if you use the Hitch Climber system). High efficiency Bronze, self-lubricating oilite bushings to reduce friction mounted on a stainless steel 303 spindle. 6082-T6 aluminum sheave color coded following the EU WLL protocol. The top anchor pin is mounted on a stainless steel 303 spindle and secured with a screw lock - the pictogram shows when the anchor pin lock is correctly secured. CE Certification to European Machinery Directive 2005.