The RYOBI #11 Hobby Knife is compatible with all #11 hobby blades. The no-slip collet and knurled grip keep you in control. The anti-roll design ensures your knife stays where you left it, while the protective cap keeps it safe in storage. The sharp, double honed #11 precision blades provide accurate cuts every time and are ideal for most light-weight crafting materials. The #11 Hobby Knife is backed by the RYOBI Limited Lifetime Warranty and includes (1) #2 Hobby Knife, (1) #2 Blade and (1) Protective Cap.