ISO Diamond Tool (3.5 mil radius point)

Tapered diamond tools (models 139-55 and 139-56) are used for scoring materials of ordinary hardness. These tools are precision lapped to a 90° angle and are available with a 3 mil (Model 139-55) or 3.5 mil (Model 139-56) radius point. Cut/Scratch Tester Accessory Models 550/551.