Robert Sorby Universal Sharpening System Upgrade Kit - 445/447UPG Key Features: This fingernail profiler upgrade kit upgrades the 445 Fingernail Profiler to the 447 Deluxe Universal System. The 447 System is descirbed below: By far the most popular option is the Deluxe Universal Sharpening System (ref. 447) which combines the best features of the Fingernail Profiler (ref. 445) and the Universal Sharpening System (ref. 446). The reason is that in one unit there is the option of a wide range of woodworking tools. It is compact, flexible, solidly constructed and easy to use. It takes all the guesswork out of returning tools to a more usable condition. Sharp tools make work so much more of a pleasure and take away a lot of frustrations. Always remember the key to good sharpening is little and often – do not wait until tools are blunt and practically unusable. All three options come with comprehensive fitting instructions. In order to use the extra jigs an Adaptor Table (ref. 447JAT) needs to be fitted to the platform.