Replacement dial set level for Centering Head No. 2UPX5 (sold separately).|Adjustable bubble protractor that covers 180 degrees through two 90 degree quadrants, reading in 2.5 degree increments.|Used with Jackson Safety Curv-O-Mark® tools, including #4, #6, #7, #8, #20 and #33.|Bubble cast in aluminum dial for added durability.|