Static Tri-Prism in context - The (STP) solves a huge problem for carpenters, handymen, and anyone with a dust problem. The STP works on the concept of static electricity. If you build up enough static electricity, it creates a static field, attracting wood particles and dust alike. The more static electricity the larger the static field, and ergo the more dust it attracts. The STP has a protective layer covering the static triangle prism, allowing the dust to be attracted to, and stick to the protective layer without the risk of discharge.