DIY Craft Knife Spare Blade Set of 5 bladesHobby blade comes in a case to keep the blades safe and lubricated.SK-5 high carbon steel knife blades #11 for smooth cutting without tears and rips. Extremely sharp and DurableFit in with craft knife handle including Xacto, easy to replaceIdeal for cutting wood, cardboard, paper, plastic, cloth, leather and foam board craft.This Nicpro Hobby Blades are the ideal tool for craftsmen, hobbyists, artists and professionals alike. Come with 120 #11 SK-5 high carbon steel blades, designed specifically to make precise, accurate cuts in light, medium and heavy weight materials.