3M 4-Sided Hand Sanding Block Sponge Variety Pack - 3M Sanding Pads 6 Pc Bundle of Grits 36, 60, 120 and 220 | Sanding Sponges Interior & Exterior Projects. This 3M dust channeling sanding sponge set includes 6 sanding sponges, including: 1 Coarse 36 sponges, 2 Coarse 60 sponges, 2 Fine 120, and 1 Fine 220. This variety 3M sanding sponge set is perfect for any situation. This 3M sanding sponge pack is great for woodworking, furniture polishing, metal dedusting, primer polishing, drywall, and so much more. These 3M sanding sponges are very durable and reliable. These 3M sponges have a comfortable grip making sanding any surface a breeze. These 3M sponges will help reduce hand soreness & hand fatigue so that you can get your jobs done faster and more efficiently. These officially licensed 3M sponges are sure to help you complete any job or project you're working at home or anywhere else!