Verification ruler UT-1000 angle of 55 degrees of accuracy class 0 Verification ruler UT-1000-60 0 class of accuracy Verification ruler UT-400-60 1 accuracy class Verification ruler UT-1000-55 2 accuracy class Verification ruler UT-400-55 1 class of accuracy Verification ruler UT-1000-55 1 class of accuracy Verification ruler UT-630 45 degree angle 0 class of accuracy Verification ruler UT-1000 45 degree angle 1 class of accuracy Verification ruler UT-630-45 2 class of accuracy Verification ruler UT-630-45 1 class of accuracy Verification ruler UT-1000-60 2 accuracy class Verification ruler UT-1000 45 degrees angle of 2 accuracy class Verification ruler UT-1000-60 1 accuracy class Verification ruler UT-400-60 0 class of accuracy Verification ruler UT-630-60 1 accuracy class Verification ruler UT-630 angle 60 degrees 0 accuracy class