I’ve been to Romstel’s dozens of times and always get very good helpful service even if I’m just buying a $3 drill bit! They have much more stuff than Home Depot or even Amazon! They’ll tell you which drill bit you can buy to drill through concrete AND rebar. They have ANY screws, bolts, concrete anchors, epoxy, Simpson truss hangers etc. Plus you get to choose zinc or galvanized or stainless steel and most everything is in stock. They’re even nice on the phone! They were a big help when I built my home 10 years ago and nothing’s changed except they moved into a bigger, newer building.