Check the listing for details. New Butterfly Training Knife Comb Trainer Metal Non Sharp Dull Practice Tool. Color: Multi, Condition: New. Listed at 7.95 USD. Premium Quality - Durably built and sleek in appearance, This knives give you the confidence to practice without fear. Our carefully designed butterfly knife trainers have a solid pin construction and copper washer setup with a spring latch to ensure these knives are made to last!Non Offensive Blade - This butterfly trainer is perfect for learning how to use the real thing without all the cuts and bruising to the hands. The unsharpened blade of our practice butterfly knife will keep you away from danger as a beginner.Perfect Center - We calculate a perfect weight balance of the butterfly knife trainer and a perfect center of mass to make sure you can flip it smoothly.No Risk & safe - This Practice Butterfly Knife has no sharp blades and is perfect for learning how to use the real thing with out all the cuts and bruising to the handsPerfect Gift - This is a gift one for your friend if they are a butterfly knives lover; they can practice without harmful yourself. Just share these with your friends.