• High precision.
• Fast.
• Accomodates AGD indicators with .375 (9.5mm) diameter stems.
• Adjustment knob for zero-setting the cartridge-type gaging head.
• Carbide lapped contact points.

High-precision, fast checking of surface plate repeatability with readings taken with a dial indicator. Detects local error, not overall flatness. The base has an adjustment knob for zero-setting the cartridge-type gaging head, and all contact points resting on the granite, including the contact point of the gaging cartridge, are carbide and lapped to a fine finish. The instrument also accommodates AGD indicators with .375" (9.5mm) diameter stems.