This instrument tool is an acrylic piano key depth checker designed for accurately measuring the sinking depth of both white and black keys during piano repair and regulation work. As a piano gauge and key depth gauge, it helps technicians compare key travel consistently, making it easier to identify uneven action and adjust the keyboard with confidence. The black white key gauge includes multiple measurement blocks for white keys and black keys, giving you a practical range of reference sizes for detailed instrument servicing. Made from wear-resistant acrylic with sturdy positioning pieces, this piano key depth checker is built for repeated workshop use and keeps its shape and readability over time. Ideal for instrument repairers and music workshops, it supports faster assessment, more precise adjustment, and a smoother playing feel that customers notice immediately.
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