If you doubt Astro Tools, just stop. I know this is kinda the wrong spot for this but, zipping off rusty old 33mm lugs with a 1/2 gun is nice. Was even
Astro Pneumatic® Professional Hand Rivet Nut Kit - TP Tools & Equipment
Astro Pneumatic Tool® 209 - ONYX™ 3" 0.5 hp In-Line Cut-Off Wheel Tool with Guard - TOOLSiD.com