4 pc Full-Ball Small Bore Hole Precision Gage Gauge Set Media Bros CR2 It is widely used in

It is widely used in light industry

SET OPTION

On-board connectivity: USB-A & B

5"TC x 1

08 inch) handle

4 pc Full-Ball Small Bore Hole Precision Gage Gauge Set Media Bros CR2 It is widely used in[MATERIAL]: The ball is made of manganese steel and the rod is made of 1215 easy cutting steel. [SIZE]: Range: 1 8" 1 2" (3mm 13mm); 4 PCS in total(1 8'' 1 5''; 1 5'' 3 10''; 3 10'' 2 5''; 2 5'' 1 2''). [OPERATION METHOD]: Rotate the rotary rod to make the ball head expand until it expands to the diameter of the hole. Take it out directly and measure the expansion diameter of the ball head at this time to get the size of the hole. [HIGH PERFORMANCE]: