Material: 65 manganese steel heat treatment, no rust, long service life.
Gauge range (Inch): 1/8"-1/5",1/5"-3/10",3/10"-2/5",2/5"-1/2".
Gauge range (mm): 3mm-5mm,5mm-7.5mm,7.5-10mm,10-13mm.
Extra long for gauging deep and shallow holes, slots and similar work.
Used for comparison measurement of bore diameter and groove width.
Method of Use: For small holes, slits and grooves of the measurement, insert gauge into small bore and
turn knurled knob to expand, remove from bore and measure with micrometers or calipers.

• TOOL LENGTH: Approx. 7.5cm/2.95", 7.8cm/3.07", 8.8cm/3.46", 9.2cm/3.62"
• GAUGE RANGE: 1/8"-1/5",1/5"-3/10",3/10"-2/5",2/5"-1/2"
• EXTRA LONG FOR GAUGING DEEP AND SHALLOW HOLES,SLOTS AND SIMILAR WORK
• NORMALLY USED IN SHALLOW HOLES,SLOTS AND GROVES, GREAT TOOL FOR CHECKING VALVE GUIDE CLEARANCE AND WEAR
• WELL PACKED WITH POLY BAG AND COLORFUL BOX