This 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 remove bolts. Durable and easy to use. Size(Dia.): 1.5， 2， 2.5， 3， 4， 5， 5.5， 6mm.Polish cloth : easily remove finger prints and light tarnish， leaving a long-lasting， mirror-like shine. Size(LXW): 30x29.5cm / 11.8x11.6inchString cleaner and lubricant stick: guitar string cleaner with two heads， one removes the rust and the other lubricates the string. Slide control system， easy to operate. Lid covers on the both heads for preventing volatilization of grease. Size(LXWXH): 13.1x3x2cm / 5.1x1.1x0.7inchFingerboard radius ruler: ideal for marking 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 keysNote: Please be reminded that all the sizes are measured by hands， there could be some slight differences with the actual item. Please understand that.