Long Reach Thickness Gage This thickness gage is designed to help you measure thickness applications when you have a lip or ledge that you need to get over to measure your parts. Specifications include... 0-2" Measuring Range 2" Max Contact Travel 6.5" Arm Reach 1.18" Contact Length Upper 1.18" Contact Length Lower 3mm Diameter Ball Tip on both upper and lower arms 0.001" Graduations