Stafford Special Tools, a division of Form Roll Die Corporation, established in 1961, is the leading manufacturer of the highest quality precision SST knurling tools, knurl holders, knurls, carrying a large selection for many applications, most in stock for immediate delivery. Our experienced engineering and sales staff can help select the right tool for your job. For specialty knurling applications, including spline rolling applications, we can design and manufacture custom tools based on your needs. Stafford Special Tools has long provided the Central Massachusetts manufacturing industry with its contract machining needs, working with all types of materials. SST is your source for affordable Special Tools.