General Tools GTM17 Protractor Square Head

The General Tools GTM17 is a square head protractor with a 6 inch adjustable arm, in ground stainless steel, with ultra-fine etched graduations reading 0 to 180 degrees in forward and reverse directions.

The square head is the specification that distinguishes this from the round head version, and it is a genuine functional difference. A square head has flat, square reference faces, which means it registers against a flat surface or an edge — you can sit it on the work, or against it, and the base is a known reference. That suits bench work, machining setups, and any situation where the protractor references a machined face or a straightedge.

The etched graduations are worth noting for the reason General states: they will not wear or rub off. A protractor is a measuring instrument, and printed markings on a tool handled with oily hands and dragged across steel do not last. Etched markings are cut into the surface and survive the tool's life.

The forward and reverse reading from 0 to 180 is what makes the tool usable from either side without mental subtraction — a source of errors when working an angle from the awkward direction.

The 6 inch adjustable arm sets bevels, takes measurements, and transfers angles.

Ground stainless steel gives precision and corrosion resistance.

Applications include machining setups, bevel setting, angle transfer, fabrication, layout, and drafting.

Users include machinists, toolmakers, fabricators, and draftsmen.

Brand

General Tools

SKU

GTM17

Category

Hand Tools

Weight

0.5 lbs

Dimensions

6.00 x 1.25 x 0.50

Price

$17.00

Availability

In stock

Rating

3.86 / 5.0