Nicholson 16573NN Warding File 4 Inches Double Cut Smooth

Product Description

The NICHOLSON 16573NN is a 4-inch American-pattern warding file with a double cut and smooth coarseness rating. Warding files are slim, flat files with a rectangular cross-section and tapered width, designed specifically for filing key slots, narrow grooves, and tight clearances. At 3/64 inches thick and 15/32 inches wide, this file reaches confined areas where standard flat files cannot. It features a tang end for use with a compatible file handle. Locksmiths, machinists, and maintenance technicians reach for this tool when cutting or refining key bitmaps, slot profiles, and precision notches in metal workpieces.

This file is sized and profiled for key filing applications. The 4-inch length keeps the tool maneuverable in close quarters. The double cut pattern uses two sets of intersecting teeth that remove material faster than a single cut, while the smooth coarseness grade leaves a refined surface finish suitable for final fitting work on keys and precision slots. It is a standard hand tool addition for locksmiths, toolmakers, and trade professionals who require controlled, fine material removal in narrow channels.

Key Features

• 4-inch length sized for close-quarters key and slot work
• Double cut tooth pattern for efficient material removal
• Smooth coarseness grade for refined surface finish on final passes
• 3/64-inch thickness allows entry into narrow keyway slots and grooves
• 15/32-inch width provides a stable filing surface in warding profiles
• Tang end accepts a standard file handle for secure grip during use

Compatibility

Designed as an American-pattern warding file suitable for hand filing applications in key cutting, locksmithing, and precision metalwork where a slim, double-cut smooth file is required.

Installation Notes

A file handle should be fitted to the tang before use to prevent hand injury from the bare tang point. Files are push-stroke tools — apply pressure on the forward stroke and lift or reduce pressure on the return stroke to preserve tooth sharpness. Always secure the workpiece in a vise or fixture before filing. Do not use this file on hardened steel above the file's own hardness rating, as this will damage the teeth.