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.