The IMB-L has a max rope diameter of 20mm. A lightweight attachment sling facilitates hauling of block, sling and rope to the climber and helps with handling, in tree stowage and workshop storage. Rounded edges to cheekplates maintain low rope abrasion when rope is fed ‘unfair’. Thrust surfaces increase tolerance to external loading of spindle and anchor pin. With direct connection to cordage, the anchor slings helps ensure correct neighbor component. Additional features include Fairlead flares that help maintain high working efficiency and high efficiency oilite bushings to reduce friction. This small impact block confirms to EN12278:2007, EN795(b):2012 and NFPA 1983(2012 Ed) Class G.