Description: 【Beginner Kits】: This guitar beginner set is for those starting their guitar . It includes a trainer and a saddle sanding stone help you practice. 【Premium Material】: The guitar trainer in this kits are made of sturdy material, ensuring long term use. 【Product Size】: The nut polished stone measures 10cmx1.2cmx1.2cm, while the trainer measures 10.6cmx5.2cmx2.2cm, making it compact and easy to carry. 【Package Includes】: Each package comes with a trainer and a nut polishing stone, providing all the essential you need to start learning guitar. 【Improve Your Skills】: With this guitar learning tool kits, you can learn and practice chords efficiently while also maintaining your guitar with the included polishing stone. Size Chart: Grinding Stone:10cmx1.2cmx1.2cm/3.94inchx0.47inchx0.47inch String Trainer:10.6cmx5.2cmx2.2cm/4.17inchx2.05inchx0.87inch Package Includes: 1 Grinding Stone 1 String Trainer Note: Please allow slightly errors 1-2cm differences due to manual measurement.