Flat File for Working at Height Choose a top-quality flat file for working at height with the Secure Tools selection. Our flat files are specifically designed or altered to include anti-drop technology that allows you to tether the handle and work safely at heights.Flat files are versatile tools that are made to sharpen bladed instruments, file material down, deburr materials and provide you with a clean finish. It’s possible to use flat files to make convex surfaces and round corners.Secure Tools is a reliable industry provider that offers durable and affordable tools to everyone, from DIY enthusiasts to building pros.