RAZAR BLACK CUTTER KNIFE BLADES 18 mm suitable for cutter knive DFC560, DFC561, DC540, DC560, DC561, DC500, DC501, DFC569, AC500, AC501, LCM500, LC560, LC561, LC500, LC501, LC520, LC521 very good for cardboard, leather, wallpaper, film and drywall moderate for plywood, lumber, floor coating and sealing compound