How To Use O-Vee Spring Gauges: Step 1
***STEP 1: INSERT*** Take the gauge in one hand between the thumb and fore/index finger and press down gently on the thumb ring to expand the coils. Scew the part to be measured into the gauge, making sure they are sufficientlyVisit the O-Vee Spring Gauges Ltd website for more information on How To Use O-Vee Spring Gauges: Step 1