The Toothy Convi Clamp with Half Coupler from Kupo is designed, as the name suggests, with teeth for the purpose of biting and gripping trees and other wood surfaces. Featuring a half coupler designed to fit tubes with a 2" diameter, this clamp is made for rigging lighting fixtures up to 220 lb. High-tensile aluminum construction lends this clamp a good strength-to-weight ratio, making it useful in a variety of situations.