Features:Made of metal， durable and sturdy.Adjustable wheel and post.Distance between first string and the last is 2.4in(6cm).Comes with two screwdrivers， easy installation.Specifications:Material: Zinc alloyPackage size: 13 * 9 * 1.5cm / 5.1 * 3.5 * 0.6inPackage weight: 98g / 3.5ozPackage List:1 * Bridge2 * Wheels2 * Post2 * Screwdriver