Custom DT Swiss Prolock internal alloy nipple with a spherical head for use on various carbon & alloy Roval road wheels with an internal spoke nipple. Square head design is intended for tensioning & truing from the base of the nipple inside the rim.
If using on a Roval straight-pull wheel, be sure to use the Roval Spoke Hold (S135300024) when tensioning/truing the wheel.
