Hook Type Digital Calipers
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Features:

Can measure the width of groove and reach the inside wall of holes and concave portions.
mm/inch conversion.
Zero-setting at any position.
With data output.

Specifications:
Measuring Range Order No. Resolution Limit Error
0-150mm 111-501 0.01mm ±0.03mm
0-200mm 111-502 0.01mm ±0.04mm
0-300mm 111-503 0.01mm ±0.05mm