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 17 Square Head Metal Protractor (17XXX)

General Tools 17 Square Head Metal Protractor (17XXX)

Product ID: 51951674

Details

Brand
General Tools
Colour
Stainless
Material
Stainless
Product dimensions
20.3L x 5.1W
Style
Square Head

📏6" adjustable arm with locking nut

🔢Permanently etched 0-180° graduations

🛠️Stainless steel durability

Bs.1273

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Description

📐 Measure Like a Pro, Work Like a Boss

COMPACT YET POWERFUL - 3-3/8" length with a 2" square head fits perfectly in your toolkit for school, shop, or site.
DUAL DIRECTION READINGS - Etched graduations from 0 to 180 degrees in both directions for versatile, error-free measurements.
ADJUSTABLE ARM LOCKED ACCURACY - 6-inch arm with knurled locking nut ensures your angle stays exactly where you set it.
TRUSTED BY PROS LOVED BY DI YERS - Preferred by machinists and woodworkers alike for setting bevels and marking precise angles.
BUILT TO LAST BUILT FOR PRECISION - Crafted from rugged stainless steel, this protractor is your forever tool—no more plastic replacements.

The General Tools 17 Square Head Metal Protractor is a precision-engineered stainless steel measuring tool featuring a 6-inch adjustable arm with a locking nut and permanently etched dual-direction graduations from 0 to 180 degrees. Designed for durability and accuracy, it’s ideal for machinists, woodworkers, and professionals seeking reliable angle measurements in a compact, easy-to-use format.

Specifications

ASIN	B00004T7TB
Best Sellers Rank	816,445 in DIY & Tools ( See Top 100 in DIY & Tools ) 636 in Protractors
Brand	General Tools
Colour	Stainless Steel
Country Of Origin	Taiwan
Customer Reviews	4.5 4.5 out of 5 stars (2,790)
Global Trade Identification Number	00038728220189
Included Components	STEEL PROTRACTOR
Item Dimensions L x W	20.3L x 5.1W centimetres
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	0.14 Pounds
Manufacturer	General Tools
Manufacturer Part Number	17
Material	Stainless Steel
Model Number	17
Number of Items	1
Style Name	Square Head
UPC	043985291384 735090080136 038728220189 732233471196 079531644847 796084346041 752913196263
Unit Count	1.0 count

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TrustScore 4.5 | 7,300+ reviews

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Bs.1273

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered 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 Bolivia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Good experience, but the tracking updates could be better.

2 months ago

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Very impressed with the quality and fast delivery. Will shop here again.

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