Top of the square portion of the pin is approximately 1/8" (4mm)
Tuning pins for dulcimer, zither, harpsichord or harps. Quantity 50. Bright steel finish, these tuning pins are nickel plated. Pins measure .198" (5.03mm) in diameter, and 1-5/8" in length. The top of the square portion of the pin is approximately 1/8" (4mm). High quality product.