Abstract: The invention as shown herein includes an apparatus and method for positioning an anchoring device in the form of a coil in a pre-drilled hole for firmly engaging a lag screw or other member. The coil consists of a series of turns and may be made of steel or plastic or combination thereof which, in use circumferentially expands in the wall of the hole and helically elongates toward the bottom of the hole. The lag members used herewith can be removed and reinserted into the embedded coil as required. Depth indicating means is placed on the setting apparatus such as a lag screw or other tool so the anchor device or coil can be positioned to a precise depth. The anchor device or coil may be formed of a suitable diameter metallic wire or may be molded or die cast from a metal or plastic material.

Abstract: The disclosure herein includes an apparatus and method for positioning an anchoring device in the form of a coil in a pre-drilled hole for firmly engaging a lag screw or other member. The coil consists of a series of turns and may be made of steel or plastic or combination thereof which, in use circumferentially expands in the wall of the hole and helically elongates toward the bottom of the hole. The lag members used herewith can be removed and reinserted into the embedded coil as required. Depth indicating means is placed on the setting apparatus such as a lag screw or other tool so the anchor device or coil can be positioned to a precise depth. The anchor device or coil may be formed of a suitable diameter metallic wire or may be molded or die cast from a metal or plastic material.