FABER-CASTELL Machine Eraser Strips Mainly used for PCB cleaning before COB process. It can be used with an electric eraser. Its advantage is that it is easy to remove oil and oxides on the PCB bonding position after SMT. The frosted eraser has excellent abrasion resistance, and the dust particles remaining on the PCB after rubbing are easy to clean. It is widely used in the pre-process of electronic industry bonding (COB).