XXT 4-way star holder with conical adapter.  Hold up to 4 unthreaded styli with 1.0 mm diameter stems.  Fits M3 conical receiver, Q-Mark product number RAP-5PF-CE. Allows 360 degrees of axial rotation.  Special wrench for set screws is included.  Stainless steel.  Weight is 1.47 grams.  Unthreaded styli sold separately.