. 3M's Stikit Teardrop Sanding Block provides a simple solution that makes sanding jobs easier, more precise and more efficient. It enables hand sanding in even hardest-to-reach areas on filler, primer and other substrates. Technicians can use the blocks to sand entire panels or to complete areas that cant be comfortably reached with machine sanding discs. These durable blocks have been designed to work with 3M's Stikit abrasive sheet rolls that feature a pressure sensitive adhesive coating on the backs. Simply press the sandpaper sheet onto the block, and start sanding. Stikit sheets remove just as cleanly, leaving an uncontaminated surface for placement of the next sheet. Stickit Sanding Blocks can also be used for wet sanding with 3M's Wetordry abrasives line. The block's bright yellow color helps make them easy to spot even in dusty shop conditions.2-1/8" X 10-3/4".