14 Types Of Chassis: This hand sanding block uses a brushed chassis and is made of four styles, concave, small arc, flat, large arc, hook and loop fastener fast change sandpaper, easy and convenient operation. 2Adjustable Air Intake Switch: This dust extraction sanding grinding block has an adjustable air intake switch with a rotary adjustment, which is convenient and easy to operate. 3Comfortable Grip: The handle of this sanding grinding block has a larger contact area for a comfortable grip and allows for easy attachment of the ring longboard filing sandpaper. 4Multifunctional: This sanding block hand sander is multifunctional and can be used for even control when sanding flat surfaces, tight corners, contours and any other hard to reach areas. 5Wide Application: This push plate has a wide range of applications and can be used as the perfect sanding or polishing tool for home cleaning, drywall sanding, fine sanding, rust and paint removal, automotive repair and paint shops, carpentry and wood furniture manufacturing, metal fabrication shops, and other home and craft projects. 1 x Main Body 3 x Sanding Boards