The RUKO Diamond Sharpening Pen (brand part no. RUK0040-CS) is a compact 4-inch tool built for quick
edge touch-ups, small enough to carry in a pocket or pack alongside a folding or fixed blade knife.

Key Specifications

• Overall length is 4 inches.
• Sharpening surface is diamond.
• Product form is a compact sharpening pen.
• Built for pocket or pack carry for quick touch-ups.
• Suited to edge maintenance rather than full-blade reprofiling.

Frequently Asked Questions

What sharpening surface does this tool use? Diamond, built for fast edge touch-ups.

Is it compact enough to carry in the field? Yes, at 4 inches it fits easily in a pocket
or pack.

Buy the RUKO 4-Inch Diamond Sharpening Pen

Order this RUKO sharpening pen to keep your blade’s edge ready between sharpenings. Shop our
RYNOBLADE KNIVES lineup in our
knife accessories
category, and our Lubbock, Texas team will ship it to your door.