I'm about to see how well these speed bleeders work. I emailed the company, and they said that the HELP brand were made by Speed Bleeder. the big one is 3/8-24 thread and the little one is 5/16-24 thread. I got them to thread my old bleeder screws onto some nuts and they were that size, and they look good, so I assume they'll fit. The speed bleeders have a longer point on the bottom, but I dont' guess that'll hurt anything. I'm about to run go try it out. The bleeders were 12 bucks a pair at O'rileys.