Features: 410 Stainless steel blade heat treated and stonewashed for a tough and durable blade. Phosphorus bronze washers provide ultra-smooth flipping action. Channel constructed black aluminum handles are strong, lightweight, and subtly textured for a sure grip. Improved machining tolerances provide maximum smoothness, minimal handle play, and zero blade tap. Description: Since it's release in 2016, the Squidtrainer has been amazingly popular among bali flippers, but Squid Industries has continued to upgrade the design to make it better and better. The V3.5 features more rounded edges, a cleaner blade finish, a textured handle pattern, and tighter machining tolerances. Check out more butterfly knives! There are a lot in stock at Blade HQ!