This grips fits the below "D" frame revolvers that are made after 1966.Steel Frame Revolvers (Serial #D900101 and above)a fa Colt Detective Speciala fa Diamondbacka fa DSIIa fa Lady Speciala fa Magnum carrya fa Police Positive Speciala fa SF-VILightweight Aluminum Frame Revolvers (Serial #200101LW and above)a fa Agenta fa Cobraa fa King Cobraa fa ViperWill NOT fit pre-1966 models with longer grip frame that has rounded bottom corners. Verify your frame by measuring distance from rear sideplate screw to grip stock-pin. Older/longer frame is approx. 3 1/4" while the newer/short frame is approx. 2 5/8".