Use: 100 and 140mm blockwork. Compatible with 40mm, 50mm or 50.8mm profiles Clamp length: 600mm 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 the highest quality materials, our range of bricklaying tools are made to last.