Marine screws are locked in place thanks to their "teeth" (the thread indentations will resist back-out even after prolonged vibration)

8 x 1 Simpson Flat-Head Marine Screw - Phillips Drive 316 SS - Box (100)

Drop-in anchors are internally-threaded

3/16 x 4 Powers Round Toggle Bolt Zinc Plated (50)

1/4-20 x 1 3/4 Simpson STB2 Wedge Anchor 304 SS (100)

1 3/16 x 23 ITM SDS Max X-Cutter Hammer Drill Bit Square Bugle-Head Self Drilling Screws 410 Stainless Steel Marine screws are locked in1 3 16 x 23 ITM SDS Max X Cutter Hammer Drill Bit . Industrial quality Special tungsten carbide tip Copper Silver brazing of carbide head Double spiral Fastest dust removal Fastest drilling speeds Clean round holes Less vibration Suitable for masonry, stone and brick aggregates Made in Germany