Ejector Spring for Bi-Metal Hole Saw Material:Spring Steel Size:fits all 1/4" pilot drills Good Qulity Package:paper box Ejector Spring for Bi-Metal Hole SawMaterial:Spring SteelSize:fits all 1/4" pilot drillsPackage:paper boxGood quality Bi-metal Hole Saw Ejector Springs. We also provide all kinds of Bi-metal hole saw sets! If you need anything, please contact us freely!