6pcs/Set Precision Telescopic Gauge 8-150 mm Micrometer Internal Gauges Hole Measurement Bore Tool

 Features:

• Range: 5/16" - 6" (8mm to 150mm), 6 pc set includes
• Stainless Steel Construction
• Spring loaded with locking knurled knob
• Gage expands in a hole to be measured (locks in place and then removed to determine final hole size using a micrometer or calipers).
• Contact points are hardened tool steel and precision ground in the end measuring radius

Spec:

Range: 5/16" - 6" (8mm to 150mm), 6 pc set includes: 
1 gage: 5/16 - 1/2" range x 4.20" overall 
1 gage: 1/2 - 3/4" range x 4.40" overall 
1 gage: 3/4 - 1-1/4" range x 4.40" overall 
1 gage: 1-1/4 - 2-1/8" range x 5.85" overall 
1 gage: 2-1/8 - 3-1/2" range x 5.85" overall 
1 gage: 3-1/2 - 6" range x 5.85" overall 
Spring loaded with locking knurled knob 
Stainless Steel Construction 
Gage expands in a hole to be measured (locks in place and then removed to determine final hole size using a micrometer or calipers). 
Get exact sizes of holes, slots, bores, or recesses 
Rigid handle and double action design (self-centering) for quick checking of inside measurements 
Constant spring tension for uniform feel 
Contact points are hardened tool steel and precision ground in the end measuring radius 
 

T-Bore Gage Range:
  5/16" - 6" (8mm to 150mm),6 pc set includes:
-1 gage: 5/16 - 1/2" range x 4.20" overall.
-1 gage: 1/2 - 3/4" range x 4.40" overall.
-1 gage: 3/4 - 1-1/4" range x 4.40" overall.
-1 gage: 1-1/4 - 2-1/8" range x 5.85" overall.
-1 gage: 2-1/8 - 3-1/2" range x 5.85" overall.
-1 gage: 3-1/2 - 6" range x 5.85" overall.
-1 Vinyl pouch