Exigo iso lever leg extension is a product that works the quads by extending the knee until your leg is straight this is a must have in any commercial gym this product has been purposely designed to be used 247 in a busy commercial environment the smooth moving parts allow any user to work comfortably without jolting the iso technology is featured in this machine which allows the users to push individual legs or equal strength training using both levers at the same time this adds a free we