Kershaw 2535 Ultra-Tek 9" Fine Diamond Blade Sharpener with Black Handle

A quality knife is only as good as its edge, and the Kershaw 2535 Ultra-Tek is built to keep your blades sharp and ready in the field or at the range. This 9-inch diamond blade sharpener is a compact, portable solution for hunters, outdoorspeople, and anyone who relies on Kershaw knives to stay in peak working condition. Unlike bulky whetstones or sharpening systems that demand water, oil, or a bench setup, the Ultra-Tek lets you touch up your edge anywhere—in your pack, at camp, or on the truck seat—with just a few deliberate strokes.

The sharpener features a 600-grit diamond-coated oval shaft that's ideal for restoring edges that have dulled with normal use. That fine grit handles maintenance sharpening without being so aggressive that it removes unnecessary steel; if you keep up with regular touchups instead of letting your blade get neglected, your Kershaw will return to shaving-sharp in minutes. The handle is machined from 6061-T6 anodized aluminum—the same aircraft-grade material Kershaw uses in quality tools—keeping overall weight down to just 2.1 ounces. Better yet, the shaft stores inside the handle for compact carry, and the design is reversible: unscrew one end and flip it to the other for a comfortable 9-inch working length that gives you leverage and control.

No special materials, no setup hassles—you just need the sharpener and your knife. Hold your blade at roughly a 20-degree angle, swipe from heel to tip in smooth passes, and repeat evenly on both sides. Lightweight, no-nonsense, and designed to live in your gear bag without taking up space, the Ultra-Tek is the answer for anyone who wants to stay sharp without the fuss.

Key Features

• 600-grit diamond-coated oval shaft for fine edge maintenance and restoration
• 6061-T6 anodized aircraft-aluminum handle for durability and minimal weight
• Reversible design: unscrew and flip for 9-inch working length
• Stores compactly at 5 inches inside the handle for easy pack integration
• Requires no water, oil, or external sharpening system
• Lightweight at 2.1 ounces—practical for field carry
• Straightforward angled sharpening stroke—no special technique required

Specifications

Frequently Asked Questions

What grit is the diamond coating, and what type of sharpening does it do?

The Ultra-Tek uses a 600-grit diamond-coated shaft, which is a fine grit designed for maintenance sharpening and edge restoration. It works best on blades that are dull but not heavily damaged—if you stay on top of regular touchups, you'll avoid letting your knife get severely worn and restore sharpness quickly.

How portable is this sharpener for outdoor and field use?

Very. At 2.1 ounces and storing at just 5 inches inside its aluminum handle, the Ultra-Tek is built for pack or pack integration. It requires no water, oil, or additional gear, so you can carry it anywhere and sharpen on demand without setup or cleanup.

How do I use the reversible design?

The shaft is stored inside the handle. To use it, unscrew the shaft from one end of the handle, flip it around, and screw it onto the opposite end. This gives you a comfortable 9-inch working length for controlled sharpening and edge realignment. When you're done, reverse the process to store it compactly.

What angle should I use when sharpening my blade?

Hold your blade edge against the diamond-coated shaft at approximately a 20-degree angle. Swipe the blade from heel to tip in smooth strokes along the shaft, and repeat an even number of times on both sides of the blade until you've restored your edge.