Perfect butterfly training is suitable for beginners and teens. Butterfly practice blade is safe and easy to use. The trainer can't be sharpened due to its design. Top-rated coolest stocking stuffers adult. Men stocking stuffers ideas. Socking stuffers ideas for adults woman, man. Wife stocking stuffer gifts. Made of high quality stainless steel,rust-inhibiting,enhanced screws are very tight and high quality. Designed for beginners and advanced learners to improve their skills safely and efficiently. Trainer ensures practice without any cuts or injuries. This tool will help you understand how it all works and it will also keep your hands safe.