This is a rubber sheet, an essential item for leathercraft. It's indispensable as a backing for tools like diamond chisels, hole punches, and cutting dies, and also as a substitute for a cutting mat. With its moderate hardness and stickiness, it offers high workability and reduces the burden on the blade. ◎Size Approximately 12 x 14 x 1.5 (cm) ※As shown in the second image, the corner of one side is beveled. There shouldn't be any inconvenience in use, but please purchase only if you don't mind. ※For convenience, it's referred to as a rubber sheet, but it's made of resin, not rubber. ※Sizes are approximate. There may be size errors and burrs due to manual cutting. I also have other leathercraft supplies for sale. If you'd like to purchase them together, I'm happy to discuss the price, so please take a look if you're interested. Leather tools are here ↓ #YLWorksLeatherTool #handmade #Leathercraft #leather #tools #punchingmat