This "Jitterbug" Orbital Sander is a compact palm-grip sander designed for wet or dry sanding on cars, trucks, & boats. Heavy duty ball bearing construction. Automatic release trigger. Well balanced for vibration free sanding. 3-3/4" x 9" paper size. Orbital Stroke 3/16". 90 PSI. Hose Size: 3/8" ID. NPT Air Inlet 1/4". Mechanics Products.,For California Residents:,   WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov,WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood "Jitterbug" Orbital Sander