This CZ Custom Shop Firing Pin Retaining Pin is a replacement SOLID Steel Firing Pin Retaining pin. Rounded on one end for easier insertion. Dimpled on the other so the roll pin punch does not slip. Precision machined. The Dimpled side of this pin is a LARGER DIMENSION, so the pin need to be installed round end first. To remove, it need to drifted out the reverse of the way it went in. The Pin may be tight in the hole and a punch will be needed to install the pin. This tight fit is what keeps the pin in place! NotesWill fit all CZ 75,85B, SP01,P07,P09,97B, and 2075 RAMI ModelsNot for TS/TS2/TSO/A01 or P10 SeriesDue to slide tolerances, the hole may need to be reamed with a .1260" reamer