The Wilson Combat #349 Spring Kit is specifically engineered for the Ruger SP101 revolver to enhance trigger performance and reliability.Wilson Combat Kit #349 for Ruger SP101Precision-manufactured replacement springsDesigned to improve trigger pull and action smoothnessProfessional-grade gunsmith componentsUPC: 874218001148This spring kit provides shooters and gunsmiths with high-quality components to optimize the performance of Ruger SP101 revolvers delivering improved trigger feel and consistent operation.