Precise Horizontal Vertical Line Measure Construction Marker Tool Multifunction Portable Optical Laboratory Accessory
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Anti-slip rubber ring: Used for line drawing pen non-slip
Aluminum alloy material, laser lettering, durable
Notes:
Quickly distinguish between primary and secondary holes: six adjacent holes with scales and rubber rings in the holes are the main
hole, and the other is the secondary hole
Main hole scale: 10/12.5/15/20/22.5/25
Secondary hole scale: 17.5 (8.25 and 26.75 are not commonly used so they are not marked)
Instructions
1. The vertical height measurement of the frame (or the interpupillary distance ruler)
2. Confirm the scale you want to use, find the corresponding hole position and insert the thin end of the pen from the side
without the rubber ring
Thick head
Thin head
3. Turn the scale used upwards, and the corresponding number is the vertical height of the hole axis (pen core). Roll the scribe
to switch the height of the scribe (if you need to use 17.5, pay attention to insert the line pen To the secondary hole)
4. Put the frame and the scribe on the horizontal table to make the scribe
Package included:
1X Lining horizontal scribe








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