Check the listing for details. (1) Chrome & (1) Black Tailpiece Stud and Anchor Sets USA 5/16-24 Thread. Color: Nickel, Condition: New. Listed at 12.00 USD. This listing is for 1 set of chrome and 1 set of black, as pictured. Note: these are new old stock. The anchors aren't pretty looking. Many of the black studs are unevenly painted, or the paint is slightly wearing off. Neither the stud or anchor are made of steel. This being said, they will function perfectly, and look great unless you're real close. Details: 5/16-24 SAE threaded bushing, commonly used in many USA made guitar tailpiece studs/anchor inserts. Made from zinc alloy. Stud thread is .74"/18.8mm in length Stud head is .47"/12mm in diameter Tailpiece mount space is .27"/7mm Anchor is .5"/12.9mm in diameter, .88"/22.4mm in overall length The anchors that we send will vary in appearance, but will all be the same measurements. Some have a flush top, some beveled.