Five to 7 counter-angled steel knives inside Models 2 and 1012 spin at 500-600 rpm, destroying CD-ROMs, data cartridges, videos, and silicon chips, plus other plastic, metal, rubber, and paper items. Interchangeable sizing screens restrict final output to max size of 2.4 mm or larger. High-capacity Model 1012 uses 15 hp motor to process up to 1,000 lb/hr.