"The BOB Knob" - By Dan Parker, "The Blind Machinist"

These knobs make life easier when using your engine hoist,trans jack or shop press. It permently attaches to the pressure release screw on bottle jacks, named the "BOB Knob". They start life as a proudly Made in America casting then 100% hand machined by Dan Parker AKA "The Blind Machinist".

Also the worlds fastest blind man at 212mph driving a C6 Corvette he designed.  They come pre-drilled to .375 and have a .187 slot for the 2 tangs on the bottle jack. If your shaft is larger just remove the set screw and drill to size. Most shafts are .365. No more fumbling with the jack handle going back and forth. No more slamming down that prize motor,even with greasy hands.