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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Square Head Protractor

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 locks angle securely

🛠️0-180° dual-direction semi-circle scale

B$42

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Description

📐 Measure like a pro, build like a boss.

EFFORTLESS ANGLE MASTERY - 6-inch adjustable arm with secure locking nut ensures flawless angle measurements every time.
PRECISION MEETS DURABILITY - Crafted from rust-resistant stainless steel for long-lasting accuracy on every project.
STABLE SECURE POSITIONING - Square head anchors firmly against surfaces, eliminating slips and guesswork.
VERSATILE DUAL SCALE DESIGN - 0 to 180-degree semi-circle scale reads angles forward and reverse for total job site flexibility.
TRUSTED BY PROS DI YERS ALIKE - Join thousands of carpenters and makers who rely on General Tools for precision and performance.

The General Tools Square Head Protractor & Angle Finder is a precision stainless steel measuring tool featuring a 6-inch adjustable arm and a 0-180° dual-direction scale. Designed for carpentry, framing, and furniture making, it locks securely with a knurled thumb nut and anchors firmly with its square head for stable, accurate angle measurements. Trusted by professionals and DIY enthusiasts, it’s a must-have for flawless cuts and perfect builds.

Specifications

ASIN	B00004T7TB
Best Sellers Rank	#20,771 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #9 in Construction Protractors
Brand Name	General Tools
Color	Stainless Steel
Customer Reviews	4.5 4.5 out of 5 stars (2,882)
Global Trade Identification Number	00038728220189
Included Components	STEEL PROTRACTOR
Item Dimensions L x W	8"L x 2"W
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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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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B$42

Duties & taxes included

In stock

Sold byAmazon BruneiDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Brunei.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Fantastic experience overall. Will recommend to friends and family.

1 month ago

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