The premium stainless-steel blade with wider cutting channel tackles a variety of tough materials. In head-to-head testing, the OLFA blade cut over 7x more single-wall corrugate than the leading competitor. The quick-change blade release system offers simple and efficient blade changes. Pull back on the red button to release and remove the used blade. Insert the new blade and click into place. The replaceable blade head reduces waste compared to disposable models. OLFA Concealed Dual-edge Safety Blade Heads, 10pk