The CL-B2Y1 Baby Stand to Yoke Adapter is perfect for any yoke mounted fixture to allow it to be attached to a 5/8" baby male stud. It comes with a 1" long M10 bolt (3/8" diameter) at the top which is more than long enough for the thickest of tubular steel yokes (like our Softlight series for example) and strong enough for even the heaviest of fixtures; and it's all metal construction will guarantee it to last for years unlike many of those commonly plastic ones. The included M10 locking nut and wing nut makes it super easy to hand tighten on your fixture's yoke. In addition, the outer diameter of the CL-B2Y1 is exactly 1 1/8" (28mm) so its also perfect to go into a junior stand receptacle directly. The 1/4-20 thumbscrew provides easy tightening of the grip onto a baby adapter to make sure it's a secure connection and won't come loose even when hanging upside down.