DOGYU Inspection / Measuring Tool Crack Measuring Needle Gauge Pen 4 0.2mm Needle, 0.3mm Needle, 0.5mm Needle, 0.7mm 01132Product code: 01132 Total weight: about 35g Total length: 145mm Remarks: 0. 2mm needle, 0. 3mm needle, 0. 5mm needle, 0. 7mm needle JAN code: 4962819011324 Useful for checking non straight crack width! You can check the crack width by inserting a needle into the crack instead of looking at it. Equipped with a dimensional gauge, which is the standard for repair decisions. Pen type portable that fits in your breast pocket. The gauge needle is made of