does this tool work so that you can get an angle and then it will let you know the degree on saw?

that's what it is designed to do, so yes if apply it to the angle you want to cut you just have to make the cut at that angle

Will this lay flat on a table, even with the wing nut?

The square head will lay flat on a table surface, the square head measure read plate is 1.22mm or 3/64'' thick thus leaving the measure indicating arm that much above the surface.Hope this answers the question and is helpful. Oscar

Are the edges of the protractor rectangular plate with the graduation truly square?. Can you use any edge adding 90 degrees when using the sides?

First question answer is yes, I checked mine at 90 degrees and 45 degrees. Second question answer yes, I have drawn two lines parallel using each side of the protractor arm. The markings run left to right to left and left to right on two levels. Trust this explanation has answered your questions.

What are the dimensions of the bar... ?

The bar, from the pivot point to the extremity is 150 mm long, 15 mm wide and about 1.5 mm thick made of stainless steel The angle measuring plate measures 90mm by 52mm.

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General Tools Square Head Protractor & Angle Finder for Carpentry & Framing

General Tools Square Head Protractor & Angle Finder for Carpentry & Framing

Product ID: 860694

Details

Brand
General Tools
Color
Stainless
Material
Stainless
Product Dimensions
8"L x 2"W
Style
Square Head

📏6" adjustable stainless steel arm

🔩Knurled thumb nut lock

🛠️0-180° dual-direction scale

21781CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Measure Twice, Impress Always: The Protractor That Means Business

COMPACT YET COMMANDING - 3-3/8" x 2" square head anchors firmly for stable, one-handed operation.
VERSATILE ANGLE MASTERY - Measure and transfer angles from 0 to 180 degrees forward and reverse with ease.
PRECISION IN EVERY ANGLE - Lock in exact measurements with the sturdy knurled thumb nut for zero slip.
BUILT TO LAST BUILT FOR PROS - Durable stainless steel construction resists rust and wear on every job site.
YOUR ULTIMATE CARPENTRY SIDEKICK - Perfect for framing, cabinetry, furniture making, and even math homework—work smarter, not harder.

The General Tools Square Head Protractor & Angle Finder is a precision stainless steel tool designed for carpenters, machinists, and DIY pros. Featuring a 6-inch adjustable arm, a 0-180° dual-direction scale, and a secure knurled thumb nut, it delivers accurate angle measurements and transfers. Its compact square head anchors firmly for stable use, making it ideal for framing, cabinetry, furniture projects, and educational tasks. Trusted for durability and precision, it’s a must-have for anyone serious about perfect angles.

Specifications

ASIN	B00004T7TB
Best Sellers Rank	#17,936 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #6 in Construction Protractors
Brand Name	General Tools
Color	Stainless Steel
Customer Reviews	4.5 4.5 out of 5 stars (2,885)
Global Trade Identification Number	00038728220189
Included Components	STEEL PROTRACTOR
Item Dimensions L x W	8"L x 2"W
Item Highlight	Carpenter square & angle gauge for woodworking. Angle finder tool & machinist square for framing & angle measuring.
Item Type Name	Square Head Angle Protractor
Item Weight	2.24 ounces
Manufacturer	General Tools
Material Type	Stainless Steel
Model	17
Number of Items	1
Part Number	17
Style Name	Square Head
UPC	043985291384 735090080136 038728220189 732233471196 079531644847 796084346041 752913196263
Unit Count	1 Count
Warranty Description	Manufacturer

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TrustScore 4.5 | 7,300+ reviews

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