1 PHF-series:I.D. diamter 12.7 mm (0.5") post holder 2 HFPH-1:Holding fork easily clamp both PHF and 3 PHF12 series post holde

 PHF-series : I.D. Ø12.7 mm (0.5") post holderPHF12-series : I. D. Ø12 mm post holderHFPH-1 : Holding fork easily clamp both PHF andPHF12 series post holderPHF8-series need to assemble with PRB series tocompatible with HFPH-1 holding forkPRB series available in M4 or M6 stud screwTo order Imperial model please add * I * to Item