Pack of 4 oversized brass inserts for the Topper Hull  . These are larger sized and should be used if the deck has been damaged when the original insert pulled out.   To fit: Screw a screw into the thread and hold with insulated pliers. Then heat insert and push into the deck where it is needed. Let the insert cool (cold water can be applied) and the deck harden around the insert before removing the screw. The screw must be to the bottom of the insert or the melted deck will push up inside the insert and block the thread