Knife Edge Vernier Calipers

Give 4 types of reading, internal, external, depth and step. Dual reading scale (metric and inch) with 14 bevelled vernier scale for reduced parallax reading error, fine adjustment assembly and knurled locking nut. Manufactured from hardened stainless steel for rigidity with satin finish. Conform to DIN 862. For quick accurate setting of all three axes (X, Y, Z) by analogue differential indicator. Suitable for all machine tools with CNC, NC, DRO and also for EDM/spark erosion tools. Universal - one tool measures length, height, diameter and centre. No calculations and no 'trial and error' involved. Increses production and efficiency, reduces job time and operator requirement. Pre-adjusted to a concentricity of 0.01mm maximum. 
Indicator diameter: 50mm. 
Clamping shank diameter: 20mm.