Get in touch with mfg. web site for the most updated product description as well as product specifications. NOT A TOY – This item is intended to be utilized for ages 14 years and up. This is not a plaything. Screws made use of on R/C are subject to massive vibration and also could cause screws to function loosened or even drop entirely out. Utilizing a specialized string lock can help prevent screws and also hardware from backing out.