4 Piece Machinist Steel Square Precision Set, 48 or 72-96 Micron Squareness 4 Piece Machinist Steel Square Precision Set, 48 or 72-96 Micron Squareness GROZ USA Two 4-piece sets: 2", 3", 4" and 6" — or 4", 6", 9" and 12" These GROZ Machinist Square Sets include four steel square sizes for checking carpenter's squares or for use as a try square when marking joints. The general-purpose squares are made from high-quality steel, and the hardened blade of each square holds its accuracy. Each square has a true right angle on both the inside and outside, so you can verify and set up machinery or test edges and faces. Both the blade and stock are precision ground to ensure a straight line. Squareness by blade length Blade length Squareness of blade 2", 3", 4" 0.0019" (48 µm) 6", 9" 0.0028" (72 µm) 12" 0.0038" (96 µm) Squares only — case not included.

4 Piece Machinist Steel Square Precision Set, 48 or 72-96 Micron Squareness

Code: 1110
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$77.78 $66.11
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Two 4-piece sets: 2", 3", 4" and 6" — or 4", 6", 9" and 12"

These GROZ Machinist Square Sets include four steel square sizes for checking carpenter's squares or for use as a try square when marking joints. The general-purpose squares are made from high-quality steel, and the hardened blade of each square holds its accuracy.

Each square has a true right angle on both the inside and outside, so you can verify and set up machinery or test edges and faces. Both the blade and stock are precision ground to ensure a straight line.

Squareness by blade length

Blade length Squareness of blade
2", 3", 4" 0.0019" (48 µm)
6", 9" 0.0028" (72 µm)
12" 0.0038" (96 µm)

Squares only — case not included.

Two 4-piece sets: 2", 3", 4" and 6" — or 4", 6", 9" and 12"

These GROZ Machinist Square Sets include four steel square sizes for checking carpenter's squares or for use as a try square when marking joints. The general-purpose squares are made from high-quality steel, and the hardened blade of each square holds its accuracy.

Each square has a true right angle on both the inside and outside, so you can verify and set up machinery or test edges and faces. Both the blade and stock are precision ground to ensure a straight line.

Squareness by blade length

Blade length Squareness of blade
2", 3", 4" 0.0019" (48 µm)
6", 9" 0.0028" (72 µm)
12" 0.0038" (96 µm)

Squares only — case not included.

Return Policy


30-Day Satisfaction Guarantee
Return Policy, Limited Warranty and Limitation of Liability
If you are not satisfied for any reason products may be returned within 30 days of shipment for a full credit or exchange (provided the product is undamaged). Return documentation should clearly specify credit or exchange. Returned items must be in the original packaging. All returns must include a return authorization (RA) number that can be obtained by contacting Groz USA Customer Service Department at 1-888-685-2916. Our customer service hours are Monday through Friday from 8:00 a.m. to 5:00 p.m. (CST). Include a copy of the original order confirmation or packing slip with your RA paperwork as proof of purchase. Returns received without a RA number may be assessed a 15% restocking (processing) fee that will be deducted from any credit due.

Shipping Policy


No shipping and handling are charged to customers for standard ground delivery on orders of $75 or more before tax. Shipping Policy Exceptions: Not all products qualify for the above Shipping Policy. Additionally, standard shipping rates will apply for all orders to Alaska and Hawaii. Any charges incurred for hazardous materials or other special handling by the carrier must be paid by the customer. If you have any questions, please call our customer service department at 1-888-685-2916

Frequently Asked Questions

Is a case included?
No. GROZ machinist squares and square sets ship without a storage case.
How accurate are these squares?
Squareness depends on blade length: 0.0019" (48 µm) for 2", 3" and 4" blades, 0.0028" (72 µm) for 6" and 9" blades, and 0.0038" (96 µm) for the 12" blade. Blade and stock are precision ground, with a true right angle on both the inside and outside edges.
Which size should I buy?
2"–4" squares suit small parts and setups in tight spaces. 6" and 9" squares are the all-round choice for checking machine setups and larger workpieces. The 12" square is best for long edges and for checking carpenter's squares.
How do I keep the square from rusting?
Wipe the square clean and dry after use, keep a light coat of oil on the blade and stock, and store it somewhere dry.
Where is this made?
GROZ products are manufactured in India by GROZ Engineering Tools, a tool manufacturer founded in 1976 with ISO 9001 certified facilities. GROZ USA, based in Wood Dale, Illinois, supports customers across North America.
Can I return it if it's not right for me?
Yes. Undamaged products in their original packaging can be returned within 30 days of shipment for a full credit or exchange. Call (888) 685-2916 first to get a Return Authorization (RA) number, and include a copy of your order confirmation or packing slip.