Check the listing for details. **Custom Reduced Power Spring kit For Smith and Wesson S&W J Frame Revolvers**. Condition: New. Listed at 10.99 USD. This is a Custom Reduced Power Spring Set, for Centerfire models, produces a smoother trigger and hammer action and can inexpensively, with good results; improve your revolvers' functionality · Fits S&W J Frame Centerfire Revolvers · Reduced power spring kit makes lighter trigger pulls and a reliable function · Drop-in fit For Models: 31, 32, 34, 36, 37, 38, 42, 442, 49, 60, 63, 631, 632, 637, 638, 640, 642, 649, 940 Includes:8# Reduced Power Hammer Spring13# Reduced Power Rebound Spring14# Reduced Power Rebound Spring 15# Reduced Power Rebound Spring Note: Springs will not fit and function in Bodyguard J Frame with a polymer frame.This Kit in most guns can lighten the trigger pull compared to a New Factory Spring Kit However, be open minded with reasonable expectations. ***If the springs are reduced too much, it will not work*** PLEASE READShipping AlertCurrently The United State Postal Service are experiencing delays with some mail deliveries, due to the current environmental situation, office closures, volume of mail and lack of transportation. Mainly associated with but not limited to First ClassThey have indicated to us that in some cases it's taking a minimum of 10 business daysPlease note if your package is delayed, which can be seen from the tracking number we provide, please be patient as it's not our fault.Also we advise you to use the tracking system on the USPS website as it's more accurate and up to date.NOTE The average results of trigger pull measurements may differ by as much as +/- 1lb. There are many factors that can cause variations in trigger pull values, including differences in manufacturing processes, the age and wear of the firearm, and the method used to measure the trigger pull weight. No two firearms are exactly the same, and even firearms produced in the same year can have subtle variations. Additionally, the wear and usage of a firearm can affect the trigger pull, as the hammer and sear may become smoother and the spring may feel less stiff over time. It is important to use a reliable and accurate method, such as the Wheeler Professional Digital Trigger Pull Gauge, to measure trigger pull weights, and to take an average of multiple measurements to account for human error.