Review on 🔩 Quantity of Stainless Square Cutting Fasteners with Screws by Aquarium Lanter

They work well but they are relatively soft (low yield point) and I spent a lot. The solution is to install a second drill with a pilot, especially on long sections. Less time than going backwards with your head blown off. 316 SS offers improved corrosion resistance, but I bet they're machine annealed too, so maybe next purchase will be with torx drive heads.