Amazon.com : butterfly knife trainer , practice stainless steel training tool for training and practice, durable stainless steel (color) (black/silver) : Sports & Outdoors
Amazon.com: XBC Tech Dragon Totem Stainless Steel Practice Butterfly Knife Trainer and Comb Knife Trainer (Black) : Sports & Outdoors
The One BM40 Trainer Balisong butterfly knife 440C mirror Blade Stainess Steel frame with Skull Camo Nylon Sheath
Amazon.com : Yuzlder Practice Butterfly Knife, Stainless Steel Balisong Trainer Unsharpened Blade with Spring Latch, Smooth Action Butterfly Knife Trainer : Sports & Outdoors