
I think it's carbon steel and I think it's strong. No, not this one. The bits work and they made some holes. But they bend so easily! In fact, they came out of plastic with a slight bend. You can bend them back into shape with your hands. However if you are looking for a real dump without the potential for wallowing. maybe it's not the best buy. But if you're just looking for a hole in a thick material (wall) and don't care how perfectly round it is, then they'll get the job done.

Chest freezer Biryusa 155KX, white
16 Review

πͺ Bi-Metal Cutting Blades: Imachinist S933414 - Enhancing Precision and Performance
10 Review

Enhanced Cutting Efficiency with Olson FB23370DB 0 025 2 Inch Blade
10 Review

High-Performance Bosch BS80 6W Bandsaw - 80 Inch 4 Inch Blades
11 Review