3M 4-Sided Hand Sanding Block Sponge Variety Pack - 3M Sanding Pads 14 Pc Bundle of Grits 60, 120, 180, 220 | Sanding Sponges Interior & Exterior Projects. This 3M dust channeling sanding sponge set includes 14 sanding including: 4 Coarse 60 sponges, 4 Fine 120s, 4 Detailing 180s, and 2 Fine 220s. This variety of 3M sanding sponges is perfect for any situation. This 3M sanding sponge pack is great for woodworking, furniture polishing, metal dedusting, primer polishing, drywall, & 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 and hand fatigue so that you can get your jobs done faster & 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!