Introducing the new CMI Tri Tie micro pulley. Unlike weaker cast models already on the market, the swinging sideplates are stamped out of 7075-T6, aircraft grade aluminum. This pulley, when rigged properly, makes possible an assortment of various techniques for climbing, rescue and load hauling techniques. Weighing in at just under 4 ounces and having a minimum breaking strength of 7000 pounds (31 kN), this little gem is a must have for the professional arborist. Size is 2.75″ wide x 3.75″ tall.