My design offers an improved alternative to existing prop lock products that have a fixed collar and do not accommodate imperfections on the construction props." The invention provides a useful ...

Make: Props and Costume Armor Shawn Thorsson Maker Media 2016, 296 pages, 8 x 9.7 x o.5 inches (softcover) ...

"As a business owner with extensive mining industry experience, I wanted to create a safety locking product to maintain the desired prop height as well as provide theft and tamper protection," said an ...