I've used Harbor Freight blades but to many were not sharp enough and ruin mats but i just found blades at Sassy Scrubs 10 for$7.50 and free shipping. www.SassyScrubs.com<object type="cosymantecnisbfw" cotype="cs" id="SILOBFWOBJECTID" style="width: 0px; height: 0px; display: block;"></object>