Features: OOTDTY Steel keys for Kalimba Mbira thumb pianos. Made of sturdy steel material, rust-proof and wear-resistant, durable. Great for replacing old or worn musical keys. Ergonomically designed and beautifully polished for a more comfortable and convenient experience. There are engraved scales for beginners to quickly identify when playing, and to quickly view scales when tuning. Specifications: Material: Steel Size: As Pictured Package Includes: 10x Steel Keys 1x Tuner 5x Screws Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color of the item.