Extension Rod 1 in Case Type case Compatible with Manufacturer Model No Digimatic and Dial Indicators and Linear Gages Contact Point Material Steel Contact Point Shape curved Contact Point Thread Size 4-48UNF For Use With 543 Series Includes Case Yes Number of Pieces 1 Overall Length 1 in Stem Dia .2 in Stem Thread Size 4-48UNF Contact Point Tip Diameter .2 in Contact Point Tip Length 1 in