RAZOR SHARP 18mm BLADES - Double-honed for extreme sharpness, our 18mm Heavy-Duty Snap-Off Speed Blades are 25% sharper than standard OLFA silver blades. These blades are made from Japanese tool-grade steel for superior edge retention and allow you to work longer uninterrupted. CONTAINS 10 BLADES / 80 SEGMENTS - You'll receive 10 blades in this refill pack. Each blade contains 8 razor-sharp LFB-10B snap-off segments (80 segments total). Simply snap for a new sharp blade edge. COMPATIBLE WITH 18mm KNIVES - OLFA's LFB-10B snap-off blades are compatible with any 18mm precision/utility knife. However, these blades perform best when equipped with an 18mm OLFA knife. CUTS A VARIETY OF MATERIALS - These replacement blades provide accurate and reliable performance when cutting cardboard, foam board, ceiling tile, shrink wrap, and more. Great for industrial use, contractors, construction, or other heavy duty jobs. THE OLFA STANDARD - As the original inventor of the Snap-Off Knife, OLFA has maintained a standard of cutting excellence for our quality and durability. Pairing your OLFA 18mm Utility Knife with OLFA 18mm Blades will provide optimal results.