Introduction SUPER Unique Sharp-Razor Series is a heavy duty wellbore clean-up scraper suitable for all downhole conditions and with robust, high performance features. Run separately or as part of a comprehensive wellbore clean-up, the SUPER Unique Sharp-Razorâ?¢ is designed to effectively remove cement and other debris from the casing wall, through reciprocation. The scraper cage flexes like a spring, to conform to the casing internal surface, to mechanically remove hard debris from the casing. The alloy bronze bearings feature both axial and radial elements to allow extended rotation in harsh environments preventing tool and casing wear. The Heavy Duty version includes an integral string mill. The Standard Duty version comes with a plain external diameter.