Paulin Drop-In anchors are ideal for anchoring bolts or threaded rod into concrete, brick, block or stone. The anchor is expanded with a setting tool which drives the internal plug to the end of the anchor. This in turn expands the four slots surrounding the plug holding the anchor in place. Drill hole size indicated in chart below. Clean hole of dust after drilling. Tap the anchor flush to the surface. Set the internal anchor using the Paulin setting tool. Drive the tool into the anchor until the tool sits flush with the surface.