The base unit, or Chassis, holds the two pieces (bottom and top) of the clamping Window in place with just the twist of a knob!

Includes 11" x 5" Window and 8" x 5" Window Set

Use Clamps when you want Faster Positioning Without Obstacles! Clamp over heavy seams, velcro, zippers, and other elements that make it almost impossible to squeeze into a hoop. Holds products steady, and never leaves a hoop burn. Perfect for leather, lunch bags, fanny packs, canvas totes, garment bags, gym bags, and more.

NOTE: When using hoops on your Brother machine that are non-Brother hoops you may have to do a trial layout. Make sure the needle or foot will not hit the frame when it is sewing.