Hollow-Set Dropin Internally Threaded Expansion AnchorProduct Description : The Hollow-Set Dropin anchor is designed for anchoring in hollow base materials such ashollow concrete block and precast hollow core plank. It can also be used in solid base materials.Precast plank or concrete masonry blocks often have a maximum outer wall thicknessof 1-1/2". During the drilling process, spalling on the back side of the wall often decreasesthe wall thickness, leaving only 1" or less for anchoring. The Hollow-Set Dropin is designedto perform in this environment, where most conventional style anchors will not function properly. General Applications and Uses :