Round File for Working at Height Find the best round file for working at height here. Secure Tools has a premium selection of handy round files that have each been designed or customised specifically for use when working at height. Each of the beautifully made round files features a curved cross-section that can be used to perfectly smooth the inside of holes or other circular grooves. Handheld round files are also used for the effortless sharpening of certain types of saws.Select any Secure Tools round file for working at height without stress. All our tools are chosen because of their premium quality and tailored to improve working at height.