Bastinelli Creations has a vicious-looking little karambit if you are looking for a concealable, defensive blade.
“The Diagnostic is a tactical backup tool that will give you peace of mind during a close quarters encounter,” according to Knifecenter.com. “It features a 1.5" blade made from N690C stainless steel with a ring hole for a rock solid grip.”
The Diagnostic is 3.75 inches overall and comes with a Kydex sheath. It’s available in stonewash or black finish for $100 at Knifecenter.com.