Mike,I have an old Dorman assortment of bleeders like that.No outside cone,or point on them.Just the inside seating cone.They actually look to be a good idea.Much easier to heat than a skinny little bleeder screw.Most have a 7/16 hex on them,and some in the box have a 1/2 inch hex.The drawback is you can't just stick a hose on them to bleed,but that's something I've never really done anyway.And,people tend to tighten them too much with the big wrench.