Achieve perfect piano tuning with our efficient and portable L-shaped piano tuning wrench set! Crafted from durable steel and plastic, these wrenches are built for long-lasting use and precise adjustments. Each wrench weighs only 78g, making them lightweight and incredibly convenient to carry, perfect for musicians on the go. The L-shaped design ensures a comfortable grip, preventing hand pain during extended use, and simplifies every tuning step. Designed to fit most upright pianos with a standard 3/16" hitch pin, the tuning hammer hole size is approximately 0.65 cm / 0.26 inches, ensuring broad compatibility. This package includes 3 square piano tuning wrenches, providing excellent value and ensuring you always have a spare. Save valuable time and effort with this essential tool, whether you're a professional tuner or a piano enthusiast.