If you're looking to start sharpening knives on your 1x30 Belt Sander, this is the perfect kit for you. We've included 1x30 sanding belts in 120 grit, 220 grit, 400 grit, 600 grit & 1000 grit. Our instructions take you step by step in choosing the appropriate grit progression based on the condition of your blade's edge. No matter the condition,you'll find the right progression in our kit. Our Recommended grit progressions are perfect for any beginner to bring their blade back to life with confidence.