Equipped with the same 3800 Motor that has been Field-Tested for nearly 70 years put into an easier to control pad size  4-1/2″ x 9″ PSA pad (compare to the 3800’s 2-3/4″ x 16″).

Able to handle all situations that the 3800 can handle, the 3900 is easier to handle for beginners and operators of all skill levels. The ease of use comes from the hands being closer together and over all points of pad contact to the processing surface.

• 5-point Suspension supports 44 square inches of sanding per orbit
• Gives equal pressure at contact points for 100% sandpaper wear
• Excellent for blocking, leveling, and a simpler control pattern than a 3800.

When operators of different skill levels are present and you need level results across your project, this is the sander to equip.