The Erick Brand Complete Set Cylindrical Dent Slugs is a collection of steel slugs designed to remove dents from brass instruments. The set includes a case for easy storage and transport. The slugs are cylindrical in shape and come in a silver color. The brand is Erick Brand and the set is specifically made for brass instruments. 1/4" x 28 threaded mandrel and case included. Latch on case is inoperable. Size range: smallest .038 and largest is .080.