Extends 40" to 60" First Flat Box Handle handmade solely from U.S. billet aluminum The 90-degree grip allows for better control over the box Ergonomic handle grip for easy brake pressure Fits all Flat Box brands The Columbia Matrix Extendable Flat Box Handle is a specialized tool used in drywall finishing and taping. Columbia Tools is a well-known manufacturer of high-quality drywall tools and equipment, and their extendable flat box handle is designed to provide flexibility and ease of use for professionals in the drywall industry. Here are some key features and details you can expect from a Columbia Extendable Flat Box Handle