Cocobolo Guitar Strap Button with Mother of Pearl Dot Genuine cocobolo strap button with 3mm diameter mother of pearl dot, made in Spokane, WA Can be installed in the neck heel of your instrument Includes a dark brown leather washer Installation requires a 1/8" drill bit and a #6 wood screw tap (not included.) Please see our $2 Strap Button Tapping Tool listing. We combine shipping for multiple Iluak items. After your purchase is complete, we will refund part of the shipping fee.