ITEM NAME:1PC Guitar Neck Wrench Key Wooden Handle Mandolin Ukulele Luthier ToolFT Features: 1. Stainless steel wrench and wooden handle, sturdy and durable. 2. Best choice for DIY handmade guitar. 3. This is a very handy tool for acoustic guitar truss rod adjustment, with the smooth wooden handle, you can easier to twist the truss rod. 4. 4mm for the most common guitars, adjust guitar neck straight, can adjust fingerboard radius. 5. Suitable for mandolin ukulele. Type:guitar adjust wrench Size:10.5cm*2.8cm Weightï ¼Å¡29g Color:silver Material:metal,wood Package includesï ¼Å¡1pc guitar adjust wrench Note: 1.Please allow 1-3mm error due to manual measurement..Suitable for mandolin ukulele. Stainless steel wrench and wooden handle, sturdy and durable. Type:guitar adjust wrench. 4mm for the most common guitars, adjust guitar neck straight, can adjust fingerboard radius.