This grips fits the below "D" frame revolvers that are made after 1966.
Steel Frame Revolvers (Serial #D900101 and above)
• Colt Detective Special
• Diamondback
• DSII
• Lady Special
• Magnum carry
• Police Positive Special
• SF-VI
Lightweight Aluminum Frame Revolvers (Serial #200101LW and above)
• Agent
• Cobra
• King Cobra
• Viper
Will 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".