Wheeler Engineering Trigger Pull Scale Specifications and Features:Manufacturer Number: 309888Wheeler Engineering trigger pull scaleAccurately measures trigger pull weightEasy to read sliding indicatorEight ounces to eight pounds (in two ounce increments) weight rangeMolded plastic constructionErgonomically shaped handle for consistent direction of pullAccurate to +/-2 ouncesThe trigger pull scale is an excellent tool for use when adjusting triggers to ensure accuracy and maintain safe performance.