The hex finger tighten lock ring that has been on Lee dies since 1981 is being updated to the spline drive profile. Easier and more convenient to use, the 1 1/8 hex profile is replaced with a spline drive and the "O" ring groove is undercut to better retain the "O" ring during shipping. The new spline drive surface gives a nice grip to finger tighten into your press, and we now have a handy wrench available that is compact and makes the new lock rings a delight to use. The lock ring wrench 90093 is now standard equipment on all Lee presses. O-ring is sold separately. Lock-rings available in a pack of 3 with the o-rings and lock-ring wrench.