Split Pins and Anchor Rivets work together as an intermediate attachment for securing cable around the perimeter. Anchor Rivets and Split Pins are meant for use in masonry, stone or brick, and require the use of a 6.5mm drill bit. Once a hole is drilled into the surface, the anchor rivet is placed in the drill hole, and the split pin in the anchor rivet. The perimeter cable runs through the eyelet at the end of the split pin. -Low profile intermediate attachment -Ideal for stone masonry or brick -1.5"