Chemical Sharpeners - chem-sharp replacement jar Chemical Sharpening: Eliminates the probability of chipping extends life of points 2 to 4 times and Economical: Over 500 perfect sharpenings without grinding without leaving work area and without cont Safety: Tungsten points sharpened by grinders are subjected to chipping and over grinding Chemical Sharpening: Eliminates the probability of chipping extends life of points 2 to 4 times and Economical: Over 500 perfect sharpenings without grinding without leaving work area and without cont