These threaded bracelet screws are handy to have on hand as they can be used on many different watches or on the new extra large watch cases made today. These threaded screws have one end that is threaded while the other end is slotted to use a standard screwdriver when putting into the band links. Since these threaded bracelet screws are sold in packages of 5 pieces, you will always have just the right size on hand. The threaded screws are 18.0mm in length and have a slotted head length of 4.80mm. Stainless steel. Sold in packages of 5 pieces.