Primacoustic F101 1020 00 Cobra Triple Grip Anchors Contractors Pack. This multi-purpose plastic anchor kit can be used in drywall, plaster, brick and concrete block to fasten Primacoustic Impalers. Unique triple action design grips in three ways: claws, expanding split core and locking toggle wings. Includes masonry drill bit, 200 anchors and 200 screws.