The Columbia Matrix Flat Box Handle is lightweight and all mechanical. With a 90 degree grip, the Matrix gives you increased control over your box. These handles are durable and extremely long lasting, all while maintaining the comfort and ease of use that you're used to with the Columbia brand of tools. The Columbia Matrix mechanical flat box handle is made of all billet aluminum, ensuring a long life. Now available in 3 sizes! Fully mechanical brake 90 degree grip allows for better control over the box First Flat Box Handle handmade solely from U.S. billet aluminum Sizes extend: 29" to 39", 40" to 60", and 56" to 76" Machined in Columbia's state of the art facility in Canada Ergonomic handle grip for easy brake pressure Fits all Flat Box brands Columbia Matrix Box Handles