Odyssey made a version of them for BMX bikes in the 90s and late 80s. (They called them Pitbulls) Until cantilever/V brakes became common place, they were the go to brake for BMX racing. I had a set, back in the day. They made stopping effortless. I'd been struggling with some cheap MX branded alloy calipers, that pulling the lever was more of a vague suggestion to slow down. I loved those Pitbull brakes.