FastCap's new 3rd Hand Magnetic Self-Closing Dust Door brings Star Trek convenience to the job site. No more fumbling with zippers every time you leave or enter your dust contained work area-just walk right through! The magnetic strip sewn into in the center flap of the door opens easily, then neatly seals itself back up behind you. It even seals itself to the metal rail along the bottom for the greatest possible dust containment. No hands are required, so if you're toting lumber, the procedure is the same. The system is designed to work with the FastCap 3rd Hand HD Extensions (68849, sold separately), which serve as door jambs. Note: Video references clamps for securing Dust Barrier Door to door jambs. Product has been updated to include 10 magnetic strips for securing door in place. Clamps not necessary.Technical Details: Self-closing magnetic door measures 38-1/2"W x 79-1/2"H on the inside, 44"W x 81"H on the outside. Door is constructed of durable nylon. Fully reusable for future dust containment tents.