Abstract: An improved pin kit with features to permit the locksmith to minimize errors in selection and use of lock pins in repinning of a lock. The kit comprises a case, preferably set at an angle, so that the pins located in a transparent pin tray, and indicia located on the underside of the transparent pin tray, are readily visible. The indicia identify pin sizes located in pockets of the pin tray, and are not prone to wear because they are protected by the transparent pin tray. Preferably, the indicia are color coded to match the similarly colored pins. A printed chart is affixed to the case, and also includes pin size identification correlated to the pin color.