Starrett® Contact Point, Individual, Ball Contact Point, 5/8 in Contact Point Length, 0.078 in Ball dia, #1-64, For Use with: 811 and 811M dial Test Indicator, Steel Starrett® PT22315 Individual Contact Point, 5/8 in Ball Contact Point, 0.078 in Ball, #1-64, For Use with 811 and 811M dial Test Indicator