Swingline Replacement Cutting Mat for Paper Trimmer / Cutter, SmartCut, Commercial, Heavy Duty, Rotary, 24" Length, 2-Pack (9624CM) Replacement cutting mat for use with the SmartCut Commercial Heavy Duty Rotary Trimmers. 24" mat size. 2 mats per box. Replacement cutting mat; For use with SmartCut 24" Commerical Heavy Duty Rotary Trimmers (9624) 24" size; 2 mats per box