This versatile sliding clamp can be used for a variety of applications Use: External corners with use of 40mm, 50mm or 50.8mm profiles Clamp length: 550mm - fits a full block and profile with ease Bar thread length: 80mm - with RHINOGRIP thumbscrew to allow clamp to be securely fixed to profile Material: Zinc plated steel for superior corrosion resistance Designed and manufactured in Britain using only the highest quality materials, our range of bricklaying tools are made to last.