1/4 x 2-1/4″ Hex Head Stainless Steel Concrete Screw Tapcon (25 pack)
The 410-grade stainless steel will stick to the magnet even though it is stainless steel of a lower grade.The 410-grade stainless steel resists corrosion in dry atmospheres, freshwater, acids, mild alkalies, food, hot gasses and steam.