The elegance of these new X3M Flight blocks from Ubi Maior conceals the fact that they can handle loads of up to 15 tons. Designed to be used with a variety of textile loops, as fixed or snatch blocks, the X3M blocks have resin frames to carry the loops and anodized aluminum sheaves riding on “techno-polymer” bearings to take the loads. They are available in sheave sizes from 1 ¼in to 4 ½in.