Products for bench top machinists | LittleMachineShop.com

Combination Square Set, 12" 4R, PEC

Combination Square Set, 12" 4R, PEC - Main image
$137.97 $199.95 In stock

Squares made by Product Engineering Corporation (PEC) made in the US are the industrial standard for precision and durability.

Made from a high-quality chrome-plated carbon steel which offers superior wear resistance and long-lasting, crisp graduations. Fully hardened, tempered and etched with precision.

A combination square consists of a steel rule (blade) and a sliding head that locks anywhere along the rule. The head typically has two reference faces: one at 90° for square cuts and one at 45° for miters. Many models include a bubble level and a scribe/awl for marking precise lines. The head slides along the rule and is secured with a knurled knob to maintain accurate measurements

Combination square with 12" machinist's blade, square/miter head, protractor head, and center head. 

4R graduations, 8ths & 16ths, 32nds & 64ths. Protractor graduated 0-180 degrees in both directions.

Heads have hammerstone powder-coat finish. Square/miter head includes level vial and hardened scribe tool.

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Customer Reviews (4.8 / 5 · 5 reviews)

Nicholas S. ★★★★★

The cast-iron head on this 12" 4R square set locks down rock-solid with no wobble, and the blade markings are crisp and easy to read. I've already used it to check a few cuts on my table saw, and the accuracy is noticeably better than my old cheap set.

Evelyn M. ★★★★★

The chrome plating on this square set is flawless—smooth and resistant to rust so far. The 12" 4R head locks down firmly with no play, which made my miter cuts spot-on. Exactly the precision I was hoping for.

Adam ★★★★★

I needed a reliable square for framing and this 12-inch set locks tight with no wiggle, the cast-iron feel gives me confidence it’ll stay true for years.