They hold the flight firmly "They hold the flight firmly on the shaft—sometimes it’s even difficult to get the flight into place. You can't use an O-ring with these, because the shaft sits at an angle when you look closely." — Tomi-Juhani P. (4/5)
I like these stems as "I like these stems as they are sturdy and last me longer than the normal ones , good price too ." — clark s. (5/5)