Crown 246PM 3/16" 5mm"Pro-PM" Diamond Parting Tool, 12-1/2" 317mm Handle The 'Elite' line of quality tools from Crown Hand Tools Ltd, Sheffield, England S390 High Speed Steel | Hardened to between 66 & 69 Rockwell Lasts 4-5 times longer than conventional High Speed Tools Black Ash Handle with Brass Ferrule Overall Length: 19" | Handle Length: 12-1/2" | Blade Length: 6-1/2" | Size: 3/16"