Product Description:MUSICIANS Guitar Care Tool Full Set Repair Maintenance Tech KitThis kit contains 7 kinds of tools. They are all packaged in a PU leather bag. It's everthing you need to keep your guitar fit and clean. And also a must for beginning or Pro guitarists. Great kit for you to improve your performance.Description:String action ruler: with scale for string height, for ridge saddle slot depth and for nuts saddles and polepieces. Suitable for string instruments such as guitar, bass, mandolin, banjo, etc. Size(LXW):8.9x5.1cm/ 3.5x2inch.String winder: can loosen and tighten strings by unwinding and winding at the tuning pegs, and also pull out the bridge pins with the notch. Size(LXW): 20x2.4cm / 7.8x0.9inch8 Allen keys: great tools for install and ve bolts. Durable and easy to use. Size(Dia.): 1.5, 2, 2.5, 3, 4, 5, 5.5, 6mm.Polish cloth : easily ve finger prints and light tarnish, leaving a long-lasting, mirror-like shine. Size(LXW): 30x29.5cm / 11.8x11.6inchFingerboard radius ruler: ideal for ing out and checking a radius when working on a fingerboard. Size(LXW): 20x2.4cm / 7.8x0.9inchString cutting pliers: a handy tool for reworking the guitar. Size(LXH): 10.5x6.2cm / 4.1x2.4inchPU leather bag: ideal bag for these finnest tools. Folded Size(LXWXT): 21.2x13.8x5cm / 8.3x5.4x1.9inchMain Material: Stainless steel.Package includes:1x Sturdy all-in-one string winder & Bridge pin puller tool1x All-in-one string cleaner and lubricant stick1x Fingerboard radius ruler1x String cutting pliers1x String action ruler1x Polish cloth8x Allen keys