Our Most Popular Single Edge Blade Precision Honed, Surgical Steel Edges Individually Wrapped to Protect the Edge Multiple Uses This CRL Single Edge Razor Blade is top quality, industrial grade, .009″ (.23 mm) thick, Carbon C-1095 surgical steel, precision-honed for extra sharpness. Single edged with safety spine. It delivers durability along with the exacting, quality cut that professionals demand. Packed 100 each per box, there are 50 boxes per case. Each blade is individually wrapped to protect the edge until you are ready to use it. Packed 100 Blades per box, there are 50 boxes per case.