Dogyu Crack Needle Gauge Pen S (0.1 to 0.5mm) #01224

• Instead of checking by eye, insert the needle into the crack to check the crack width! • Fitted with dimension gauges that serve as criteria for repair decisions (0.1mm, 0.2mm, 0.3mm, 0.5mm, 0.7mm, etc.). • Portable pen type that fits in a chest pocket. • Gauge needles are stainless steel! The base is spring-loaded, a cushion structure that resists breaking.