The Heavy-Duty 300 Guillotine Shear from Durston. This is a reliable and heavy duty professional tool for cutting and shearing metal in your jewellery workshop. The precision ground hardened blade can be turned around four times before needing sharpening, giving you increased utilisation between maintenance and a lifetime of work for many users. The guillotine will cut up to 300mm wide and 3.5mm thick of non-ferrous metals (including gold and silver), and 300mm wide and 2mm of mild steel ensuring clean cuts every time.