1RUBBER HAMMER: The guitar string hammer kit include a hammer with an excellent rubber head to prevent injury to string nails or nuts, protective and useful 2GUITAR REPAIR SUPPLIES: The guitar string changer kit is perfect for maintaining and keeping guitars and other instruments intact and neat, useful and practical 3WEAR RESISTANT MATERIAL: Alloy 12CM open wrench, specially designed for the hex nut on the guitar accessories, the common knob nut and potentiometer nut are 12cm nuts, lightweight design, wear resistance and durability are high 4COMPACT AND PORTABLE: Guitar string stretcher tool is small, easy to carry out, convenient to use, and practical, provide great convenience for maintenance 5WIDE APPLICATION: Guitar string change tool kit is suitable for electric guitar, mandolin, bass, ukulele, banjo, acoustic guitar, etc., very versatile 1 x Dusting Brush 1 x String Winder 1 x Hammer 1 x L Shaped Wrench 1 x Cross Screwdriver 1 x Wiping Cloth 1 x Pliers 1 x Wrench 1 x Storage Bag