The Norton MF-34 Square India Stone, 4 x 3/8-Inch is a bench sharpening stone from Norton, cut to a square cross-section and sized 4 x 3/8-inch for small, detailed sharpening jobs. It’s built for gunsmiths and shooters who touch up an edge or a trigger contact surface at the bench rather than sending it out. Norton has made abrasive stones for over a century, and this size and cut is a common pick for detail sharpening work that a full-size bench stone is too coarse or too large to handle. Keep it in the toolbox next to your files and punches.

Key Specifications

• Cut to a square cross-section, suited to inside corners and flat contact surfaces.
• Sized at 4 x 3/8-inch, small enough for detail work a full bench stone can’t reach.
• Made from India stone abrasive, Norton’s long-running oil-stone material.

Frequently Asked Questions

What shape is this stone? Square in cross-section, per the MF-34 designation.

What size is it? 4 x 3/8-inch, a compact size for detail sharpening.

Buy the Norton MF-34 Square India Stone, 4 x 3/8-Inch

A stone that’s actually sized for the job beats fighting a bench stone that’s too big for the surface in front of you. Order it from our gunsmithing tools and supplies selection for fast shipping direct to your door.