OLP1735 Features: * Crystolon Combination - for general sharpening when the speed of sharpening is more important than the fineness of the cutting edges * Crystolon-India Combination - producees strong, long-lasting, keen edges on tools * India Combination - produce strong, keen, long-lasting edges on quality tools * India-Soft Arkansas Combination - preferred by woodworkers for sharpening straight blades and gouges * Applicable Materials: Hard Steel