Features: 1. Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information;2. If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3. Size: T type: Length: 45mm/1.77inch. Height: 35mm/1.38inch, Socket Inner Diameter: 5.5x5.5mm/0.22x0.22inch; Z type: Length: 65mm/2.56inch, Height: 44mm/1.73inch, Socket Inner Diameter: 5.5x5.5mm/0.22x0.22inch.4. Made of high-quality metal, chrome-plated surface, more , and can be used for a long time.5. Suitable for all 1/4 inch standard socket square drum key tension rods. Used for snares drums, toms drums and bass drums.6. It is an ideal tool for quickly and easily disassembling and replacing drum heads.7. 3 of the most popular drum keys in one package. More cost-effective.Specifications:Material: Chrome Plated SteelColor: SilverBrand name: BQLZRSize: T type: Length: 45mm/1.77inch. Height: 35mm/1.38inchZ type: Length: 65mm/2.56inch, Height: 44mm/1.73inchSocket Inner Diameter: 5.5x5.5mm/0.22x0.22inch.Weight: 99gPackage include:3 x Drum Tuning Key