This 3" Cut-Off tool manufactured by Silverline, this 3" cut-off tool has a 180 degree guard to protect from sparks and disc break up. Description from pinterest.com. I searched for this on bing.com/images
The only picture ever taken of Concorde flying at Mach 2 (1,350 mph). Taken from an RAF Tornado fighter jet, which only rendezvoused with Concorde for 4 minutes over the Irish Sea: The Tornado was rapidly running out of fuel, struggling to keep up with Concorde at Mach 2.