Plasti-Grip Plastic Masonry Fastener

Plasti-Grip Plastic Masonry Fastener PMF is used to attach 2-1/2 in. to 3 in. rigid insulation or mineral wool to concrete or CMU block. Simply pre-drill a 5/16 in. Dia hole through the insulation into the concrete/CMU insert anchor and tap flush with a hammer. This all plastic design will not rust or corrode and is thermally efficient.