Fowler’s Electronic Depth Gage comes with six interchangeable rods with a 0.22″ capacity, carbide contact point and 2 extra points for small applications. Provides rapid electronic display measurement of hole depths. Features: Rod extensions of 1″, 2″, 3″, 4″, 5″ and 6″ are included. Rods can be connected together for a full 0.22″ capacity. Includes 2 extra points for small hole applications; one 0.078″ dia. x 1″ long and one needle point x 1″ long. Base is hardened steel, ground and micro lapped for accuracy. Base Size: 4″ x .630″. Standard 4-48 thread removable carbide ball contact point. Includes shop hardened case. Indicator Features: 0-1″ travel electronic indicator with 3/8″ stem. Resolution: .0005″/.01mm. Direct inch/metric conversion. Zero reset at any position. On/off button. Hold feature. Relative/absolute measuring.