Eyeglasses Horizontal Vertical Measure Construction Tool Multifunction Portable Optical Laboratory Accessory

Eyeglasses Horizontal Vertical Measure Construction Tool Multifunction Portable Optical Laboratory Accessory Description

Specifications:
When viewed from the side with scales, you can see a rubber ring in the hole. This is the hole which you will use.
Main hole scales:10 / 12.5 / 15 / 20 / 22.5 / 25
Second hole scales:17.5 (8.25&26.75 not frequently used, so they are not marked.)
Vertical height measurement of the frame;

Confirm the scale you want to use and find the corresponding hole position. Insert the thin of the marking pen into the hole from the side without the rubber ring.
Scale , the number shown represents the vertical height of the hole center (pen core) at this , and you can the scribe height by rolling this unit. (If you need to use 17.5, please insert the marking pen into the second hole)
Put the Frame and the a horizontal table, then do the scribe.
Color:
Material: aluminum alloy

Package Contents:
1 x Liner template scriber