When you think of a knife with a ring in the handle butt, a karambit probably comes to mind. Fact is, there are other knives with such a feature.
Sterling Knife Sharpening
Japanese knife(Sushi knife)
Dull Knife and No Sharpener? 3 Household Items You Didn't Know You Can Use to Sharpen Your Knives - Knife Thoughts
CQB Tool - Pineland Cutlery, Inc dba SPARTAN BLADES
Benchmade Three-Piece Chef's Knife Set Review: Light and Sharp
Doug Marcaida Talon Fixed Raid Knife: High-performance & Durable
Know your knives – Reading Eagle
Learn the Parts of a Knife and Know What to Look for When You Buy
Blade Magazine - When you think of a knife with a ring in
Different Knives and the Best Uses for Each One - Escoffier
Illinois Knife Laws - The Law Offices of Andrew Nickel
Best Pocket Knife of 2024
7 Best Small Pocket Knife – Easy Carry Knives For 2024