Carbide Ball Point, Case Type case, Compatible with Manufacturer Model No. Digimatic and Dial Indicators and Linear Gages, Contact Point Material Steel, Contact Point Shape Flat, Contact Point Thread Size 4-48UNF, For Use With Series 2 Dial Indicator, Includes Case Yes, Number of Pieces 1, Overall Length .3 in, Stem Dia. .06, Stem Thread Size 4-48UNF, Contact Point Tip Diameter .2 in, Contact Point Tip Length .2 in