Adhesive Medium Aluminium Oxide Emery Strips 30µm. Size 200mm x 21mm. Can be put on conventional filing tool, for example an old flat file or emery stick. Durability is about 50 times longer compared to conventional emery sticks. Can also be stuck to the desk, and can be removed and put back several times without loosing the adhesive power. Use only on degreased tools. Can be cut to shape.