The ABC arm bow corrector is the newest small tool to help you improve your bowing skill on any stringed instrument. Developed and patented by Prof. Christoph Henkel in Germany, this little gadget is a must-have for violin, viola, and cello players all around the world. There has been quite an extensive list of renowned violinists recommending this device such as Shinichi Suzuki himself who was a respected Japanese violin teacher who insisted on his students using only traditional techniques with no electronic products involved or Ivan Galamian another famous Russian String Quartet composer, but there are many other people that swear by this product's effectiveness too! The ABC arm bow corrector can keep you tuned up and playing brilliantly without having to fuss