We’ve been sourcing these form teh same shop for about two years now, and they basically handle everything from drywall taping to scraping old paint off window frames without a hitch.
You’ll want the 6-inch for tight corners and the 12-inch for large flat surfaces—the flat edge glides compound pretty evenly, and the 0.5mm blade thickness gives you enough flex to work compound without gouging.
Blue steel is more flexible for smoothing, but stainles resists rust better if you’re working in damp basements or washing them frequently—both hit HRC 50-55 hardness, and weight runs 200-400g depending on size (check lead time for the 10-inch, we usually have stock but confirm).
ANSI and ISO9001 compliance means these pass most job site inspections without extra paperwork, and the ergonomic plastic handle actually reduces hand fatigue after a full day of taping ceilings.
3 to 5 working days for standerd orders, but custom branding takes another week or so—not suited for heavy demolition scraping though, blade edge is flat, not chisel-ground.