What type/size screws should you use? Are these masonry screws for brick/concrete? Can use on outside of home?

Unfortunately, you can't use masonry screws with this, as the holes are too small to allow even the smallest of those. But if you can get small sheet metal screws to stay in concrete, those can work.

How is this attached to the wall?

I used epoxy to attach it to a concrete wall. Still attached about 6 Months later.

Description says "the two pegs are removed". The order I received had no pegs, nothing holding the halves in alignment. What pegs?

I did not receive pegs either. Probably out of date instructions. I just aligned the cross hairs with zero, taped the two halves together, then epoxy to wall, then remove tape when epoxy dry. You can also use tape to adhere to wall while epoxy dries.

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🕵️‍♂️ Stay ahead of structural shifts with precision crack monitoring!

CLEAR VISUAL GRID - Easy-to-read measurement grid ensures no detail is missed
ROBUST RELIABLE - Crafted from high-quality polymer for long-lasting durability
WIDE MONITORING RANGE - Tracks crack movement up to ±20 mm horizontally and ±10 mm vertically
PRECISION YOU CAN TRUST - ±0.5 mm discrimination for ultra-accurate crack tracking
EFFORTLESS ANALOG MONITORING - Simple manual operation—no batteries, no fuss

The Mountlaser Crack Monitoring Record CM-01 is a manual analog device designed to precisely track wall crack movements with ±0.5 mm accuracy. Featuring a clear measurement grid and a durable polymer body, it monitors horizontal shifts up to ±20 mm and vertical shifts up to ±10 mm, making it an essential tool for structural health monitoring.

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Manufacturer	Mountlaser
Part Number	GLN-LFY
Item Weight	2.39 ounces
Product Dimensions	3.2 x 5.2 x 2 inches
Item model number	CM-01
Style	1PCS
Material	plastic
Power Source	manual
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

Crack Monitoring Record, Standard Tell-Tale Crack Monitor for the Standard and Corner Tell-Tale (1PCS)

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