This mini valve spring tester from Comp Cams is designed to be a portable low cost alternative to bench top style spring testing. The gauge will read 0-1000 lbs. and is scaled in 20 lbs. increments. This mini valve spring tester from Comp Cams also features a rubber gauge protector and recalibration feature. This mini valve spring tester can be placed in a vise, used with an arbor press or used in a drill press (with proper flange).