This could be attached to a rotary hammer drill to allow straight and leveled drilling in concrete?

This protractor has magnets on three sides and as long as your drill has an iron case, the magnet will adhere to it. I'm not sure what the constant banging of the from the drill will do to its accuracy. And trying to constantly watch it while you are drilling is not going to be easy. I might suggest a drill guide like this: Milescraft Drill Guide Rubber | 13350003 Copy and paste it in your browser.

Is it made of aluminum or plastic?

It is metal and non-magnetic but it is painted silver so I'm assuming it's aluminum. It is heavy for it's size and so far very sturdy. I used it during a Jeep project and it hit the cement floor a few times without any problems. The case is scratched but not dented.

Fowler 54 422 450 1 Mini Mag The Original Protractor

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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€ 260.62

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Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📏 Measure Like a Pro, Magnetically Secure Your Edge!

TRUSTED BY PROS - Backed by a 1-year warranty and a 4.6-star rating, this protractor is the go-to tool for machining, construction, and electrical pros alike.
MAGNETIC MASTERY - Embedded magnets with a powerful 35-lb pull ensure stable, hands-free use on any metal surface—work smarter, not harder.
COMPACT YET MIGHTY - Sleek 2.375" size fits perfectly in your toolkit without sacrificing performance—portable precision wherever you go.
LONG LASTING POWER - Up to 250 hours of continuous use on a standard 9V battery means less downtime and more productivity on the job.
PRECISION AT YOUR FINGERTIPS - Experience ultra-accurate angle readings with ±0.2° accuracy and 0.05° resolution—never second guess your measurements again.

The Fowler Mini-Mag Protractor is a compact, digital angle measuring tool featuring a full 360° display, ±0.2° accuracy, and embedded magnets with a 35-lb pull for hands-free use. Powered by a standard 9V battery lasting up to 250 hours, it’s designed for precision and durability in professional machining, construction, and electrical applications.

Specifications

ASIN	B002RUCS9M
Battery Cell Type	Alkaline
Best Sellers Rank	#364,618 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #177 in Construction Protractors
Color	Blue/Black
Customer Reviews	4.5 4.5 out of 5 stars (145)
Date First Available	November 9, 2004
Display Style	LCD
Included Components	Mini-MAG Protractor, 9V battery, screwdriver, fitted box, instructions
Item Package Quantity	1
Item Weight	8.8 ounces
Item model number	54-422-450-1
Manufacturer	Fred V. Fowler Company, Inc.
Measurement Accuracy	+/- 0.2 degrees
Part Number	54-422-450-1
Product Dimensions	3.5 x 3.25 x 1.75 inches
Size	2.375 x 2.375 x 1.375"
Special Features	digital
Style	Mini-Mag Protractor
Warranty Description	1 yr warranty on material and workmanship

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