DA38 L.H. Dottie 3/8" Drop In Anchor Drop In Anchors: This steel anchor performs well in a variety of concrete strengths. Can be used in brick.Any head style screw can be used. The screw can easily be removed or loosened and retightened. Drill hole in concrete and drop anchor into hole. Place setting tool over anchor and hammer until set.ANCHOR SIZE : 3/8-16DRILLSIZE : 1/2"REQUIREDTOOL : AT38