Mitutoyo Series 180 Combination Square Set is coming with three heads which is attachable to the stainless steel rule(blade), allowing versatile measurements on various types of work pieces. Features: Measuring head is attached to the graduated steel rule (blade), allowing versatile measurements on various types of work pieces The measuring head comes hardened or cast iron-not-hardened Inside Spring Caliper – Ends fully rounded to give accurate contact with a work piece. Square head: Used to set the rule at 90 degrees or 45 degrees to an edge of a work piece. Center head: Used to locate centers of round work pieces Protractor head: Used to set the rule at a desired angle to an edge of a work piece. Also used for measuring angles. Model Number Size Graduation 180-907U* 12” / 300 0.5mm
