1、Premium Materials: The drum key is made of premium metal structure, strong and durable. 2、Drum Key Kit: This set has 1pcs Z type Drum Key and 3pcs T type Drum Key, 4pcs in total, it can fully meet your needs. 3、Portable and Convenience: This drum key tool is ideal to keep in your bag or around the rehearsal space. 4、Fine Workmentship: This drum tuning key kit features fine workmanship and exquisite texture, which ensures high reliability. 5、Wide applicability: This drum tuning key suitable for mainstream drums, as well as screw snare drums in squareness, marching drums, etc. 4 x Drum Tuning Key Item Type: Drum Tuning Key SetMaterial: MetalColor: SilverProduct Size: Z Type Size: 6.3 x 5 x 1.2cm / 2.5 x 2 x 0.5in, Inner Diameter 0.55cm / 0.22in T Type Size: 4.7 x 3.6 x 1cm / 1.9 x 1.4 x 0.4in,  Inner Diameter 0.55cm / 0.22in