Description: 【Professional Drum Hardware Tools】: Drum Key is designed for adjusting and fixing hardware on drum sets, such as drum legs, stands, and hi hat stands. The square head design ensures a secure fit with the square screw holes on drum hardware 【Multifunction adjustment function】: Drum Tuning Key is suitable for loosening or tightening the screws on drum legs and stands to adjust the height and angle of the drum. It can also position hi hat stand to ensure comfortable and stable use 【Square head design】: Drum Wrench's square head design matches the square screw holes on drum hardware to prevent slipping during adjustment, allowing for a more reliable grip 【Portable and sturdy structure】: Drum Key Tuner is made of high strength steel and metal, which is both lightweight and ensures durability, making it easy to carry 【Comprehensive set】: Drum Keys Set includes 3 T shaped wrenches and 1 Z shaped wrench, providing a complete for various adjustment needs Size Chart: T wrench: 4cmx3.9cmx1cm/1.57inchx1.54inchx0.39inch Z Drum Key: 6.7cmx4.5cmx1.2cm/2.64inchx1.77inchx0.47inch Package Includes: 3 T shaped drum keys 1 Z shaped drum key Note: Please allow slightly errors due to manual measurement and different monitors.