Features and Benefits * Made in the U.S.A. by Viking * Original straight line sander from Viking * Strength of dual action piston * Removes material from large areas quickly * Two year warranty Removes material from large areas quickly. Provides smooth operation on all surfaces - metal, putty, and fiberglass. Dual piston makes this a powerful tool. Specifications include: 2400 SPM, 4 cfm, required pressure: 90-100 PSI, supplied pad size: 2-3/4" x 17" Klip-on.