Editorial Review Details make the difference: these beautiful strap buttons match our bridge pins, and the knobs on Waverly guitar tuning machines.They'll add a touch of class to your guitar. Each is precisely machined (none of the unsightly mold lines found on plastic buttons), and polished to accent the beauty of the material. A special countersunk brass bushing helps protect the button against overtightening " a unique StewMac feature.Button diameter: 17/32" (13.28mm)Button height: 7/16" (11.11mm)Our ivoroid strap buttons are made of Galalith, a dense and durable casein-based material that polishes beautifully. Popular in the early 20th century, Galalith is seen today mainly in collectible vintage jewelry. It cannot be molded; each pin is precisely machined and has none of the unsightly mold lines common to plastic
Features 1) Add a touch of class to your guitar 2) Ivoroid strap buttons are made of Galalith, a dense and durable casein-based material that polishes beautifully 3) Precisely machined, so there are no unsightly mold lines like the ones found on plastic buttons 4) Comes with a special countersunk brass bushing helps protect the button against overtightening - a unique StewMac feature 5) Includes strap button, brass bushing, and mounting screw