Combination Square Set SERIES 180 Technical Data Square head: Used to set the rule at 90 degrees or 45 degrees to an edge of a workpiece. Center head: Used to locate centers of round workpieces Protractor head: Used to set the rule at a desired angle to an edge of a workpiece. Also used for measuring angles. FEATURES * The measuring head come hardened or cast iron-not-hardened * Economy sets not including a protractor head are also available * Measuring head are attached to the graduated steel rule (blade), allowing versatile measurements on various types of workpieces SPECIFICATIONS Head Only 1 part set Hardened Order No. Description 180-102U Square Head for 12"/300mm to 24"/600mm 180-202U Center Head for 12"/300mm to 24"/600mm 180-931U Head Only Order No. 180-112U 180-212U 180-301U 180-113U 2 part set Cast iron-not hardened Description Square Head for 12"/300mm to 24"/600mm Center Head for 12"/300mm to 24"/600mm Protractor Head for 12"/300mm to 24"/600mm Double Square Head for 4"/100mm and 6"/150mm 180-903U 3 part set Inch/Metric Set No. 180-905U 180-903U 180-904U 180-905U 180-906U 180-907U 180-910U 180-931U 180-932U 180-933U 180-934U Blade Size 12" 12" 12" 12" 12"/300mm 300mm 12" 12" 12"/300mm 300mm Hardened Combination Square Sets Type 4R 16R 4R 16R E/M Metric 4R 16R E/M Metric Square Head Center Head Protractor Head 180-501U 180-502U 180-501U 180-502U 180-503U 180-505U 180-501U 180-502U 180-503U 180-505U 180-102U 180-102U 180-102U 180-102U 180-102U 180-102U 180-102U 180-102U 180-102U 180-102U 180-202U 180-202U 180-202U 180-202U 180-202U 180-202U - 180-301U* 180-301U* 180-301U* 180-301U* - *Cast iron-not hardened Inch/Metric Set No. 180-301U 180-202U 180-102U 180-803U 180-804U 180-805U 180-806U 180-807U 180-810U 180-831U 180-832U 180-833U 180-834U Blade Size 12" 12" 12" 12" 12"/300mm 300mm 12" 12" 12"/300mm 300mm Cast iron-not hardened Combination Square Sets Type 4R 16R 4R 16R E/M Metric 4R 16R E/M Metric Square Head Center Head Protractor Head 180-501U 180-502U 180-501U 180-502U 180-503U 180-505U 180-501U 180-502U 180-503U 180-505U *Cast iron-not hardened US-1002 E-35 180-112U 180-112U 180-112U 180-112U 180-112U 180-112U 180-112U 180-112U 180-112U 180-112U 180-212U 180-212U 180-212U 180-212U 180-212U 180-212U - 180-301U 180-301U 180-301U 180-301U -