Description: RALIABLE QUALITY: The metal shaft handle abrasion resistance fine texture and comfortable handle. Can be used for a long time. FLEXIBILITY: four corners of wrench provide extra flexibility. Never damage the guzheng. EAsy to CARRY: Small and exquisite convenient to carry it design easy to use it. DESIGNED FOR: it can be used to tune the of piano and guzheng. FOR BEGINNERS: Complete tuning tools perfect for beginners students and professionals. Specification: Material: Metal Size Chart: approx. 160x35x11.5mm/6.30x1.38x0.45inch Package Includes: 1x Tuning Hammer Note: 1. Please allow slightly error due to manual measurement.