VERNIER CALIPER

For inside and outside measurement in metric or English units. Ideal
for learning precision measurement techniques by using the vernier
principle.
Has       metric
scale to 12.5cm
in 1 mm steps
and the 10 part
vernier reads
to       0.1mm.
English scale
is graduated to 5in in 1/16in divisions and the 8 part vernier reads
to 1/128in. Features a locking pin to secure readings and knurled
thumbwheel permits fast, easy measuring. Beveled cross horns are
useful for internal measurements. Made of plated steel and packed
in a plastic case.