Description: 【Professional drum hardware tools】: Drum Keys, designed for adjusting and fixing hardware on drum sets, such as drum legs, stands, and hat stands. The square head design ensures a securely fit with the square screw holes on drum hardware 【Multifunction adjustment function】: Drum Tuning Keys are suitable for loosening or tightening the screws on drum legs and stands to adjust the height and angle of the drum 【Square head design】: Drum Wrench's square head design matches the square screw holes on drum hardware to keep from slipping during adjustment, allowing for a reliable grip 【Portable and sturdy structure】: Drum Key Tuners are made of high strength 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: length about 4cm/1.57inch Z wrench: length about 7cm/2.76inch Package Includes: 3 T shaped drum keys 1 Z shaped drum key Note: Please allow slightly errors due to manual measurement and different monitors.