EveryMarket

1pc POM Plastic Safety Durable Practice Butterfly Trainer Knife Toy

Shark Squid Mako Clone Balisong Trainer Butterflyknife Flipper Bottle Opener Bushings System Aluminum Channel Handle Safe Toys - Knife - AliExpress

GOOD WORKER Butterfly Knife Trainer Balisong - Practice Butterfly Knife - Balisong Butterfly Knives Dull Not-Sharp Blade - Skeleton Dull Trick Butterfly Knifes - Butter Fly Knife Training CSGO K16 S - Yahoo Shopping

Butterfly Trainer - American Patriot Balisong - New 2023 Practice Butterfly Knife - Butterfly Knives NOT Real NOT Sharp Blade - USA Flag Dull Trick Butterfly - Butter Fly Training CSGO K14 U - Yahoo Shopping

Little World Butterfly Knife - 1 Pack Butterfly Knife Trainer Practice Tool Steel Metal - Folding Knife Unsharpened - Butterfly Knife Comb for Practicing Flipping Tricks, Balisong Trainer Black : Sports & Outdoors

Kali Escrima Practice Safety Butterfly Filipino Batangas Knife balisong Trainer

How to Butterfly Knife/Balisong for First-timers – Squid Industries

Update: I've successfully sandpapered off the fin. I still think a trainer basically having a spike on the safe handle blade is bad design, since it's supposed to be for beginners.