The CRL Triangle Backer Pad is an triangular aluminum plate measuring 3" (76 mm) from point to point, backed with a 3/16" (4.7 mm) layer of vulcanized rubber, and finished with a layer of hook material for attaching hook-loop abrasive sheets. Excellent for detail point sanding, broad edge seaming, and a variety of other applications. The MFTTSD can be mounted on any angle on the MFT1 Multi-Function Tool, and is sold one each. Important Notes: Use care with any sharp cutting implement. Always turn tool off and unplug from power when changing blades. Wear safety glasses whenever debris may become airborne.