Clarke ET135 12″ Engineers Rule Description A standard 300mm Stainless Steel measure for the precision engineer. £12.54 In stock Clarke ET135 12" Engineers Rule quantity Add to basket EAN: 5016086101680 SKU: 1700295 Category: Engineering Hand Tools - Measuring Equipment Description Specification Manufactured from stainless steel Calibrations etched in imperial and metric. Related products Clarke CM170 Combination Square Set £52.98 Clarke ET156 – 3″ Feeler Gauge £16.98 Clarke CM190 Micrometer £20.16 Clarke ET128 Depth Gauge with Protractor £19.81