An improved angle between blade and handle to provide more space for knuckles, whilst the slimline front for easier use in confined spaces. the detachable front knob lets you apply extra power when required. The blades are double-edged solid tungsten carbide, slightly convex to prevent scratching the surface being worked. Being solid tungsten the blades themselves will last up to one hundred times longer than conventional steel blades. Designed for removing paint, glue, rust and varnish on all types of surfaces. These tools find a use with woodworkers, restorers, boat builders and many others. The 665 is supplied with a 65mm long blade, when the blade becomes dull simply turn it over to use the second edge, It is designed to take both 50 and 65mm replacement blades.