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The WILLIAMS COMFORT PRODUCTS 1-160-04-3-0 is a 4-inch square file rated at a smooth cut profile with 71 teeth per inch (TPI). Square files are used to enlarge and finish square or rectangular openings, slots, and keyways in metal workpieces. At 71 TPI, this file produces a refined surface finish suitable for precision fitting work. The compact 4-inch length makes it well suited for tight access areas and detail work on small components. Installation and maintenance professionals across multiple trades keep files like this in their standard hand-tool inventory for deburring, fitting, and finishing tasks.
This square file is appropriate for use in light industrial, mechanical, and trade service environments where precise filing of metal surfaces is required. Typical applications include refining keyways, squaring slot edges, and deburring machined or cut metal parts. The smooth-cut designation means it removes material slowly and leaves a finer surface, making it best suited for finishing passes rather than rapid stock removal. Trade technicians in HVAC, plumbing, and electrical service work use files of this type for field fitting and cleanup of metal components during installation or repair.
Designed as a general-purpose square hand file suitable for use on ferrous and non-ferrous metals in standard trade and mechanical service applications.
Square files should always be fitted with an appropriate handle before use to prevent injury from the tang. Apply consistent, even pressure on the forward stroke and lift the file on the return stroke to preserve tooth life. Secure the workpiece in a vise before filing to maintain control and accuracy. Inspect the file regularly for clogging and use a file card to clean the teeth as needed.
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