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".