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QUICKMECHTOOLS · SKU
12" High Precision Carpenter's Triangle Ruler
$25.00$37.00
Save $12.00 (32%)
or 4 interest-free payments of $6.25 with Shop Pay
●ships today if ordered by 2pm ET
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LifetimeWarranty
Free ShipOrders $49+
30-DayReturns
Fast US Shipping
Ships from Ohio · Free standard shipping on orders $49+. Expedited available at checkout.
Product Details
Everything you need to know — features, specs, fitment, and answers to the most common questions.
12-inch reach for wide stock
Marks full-width square lines across 2x10s and 2x12s that a standard speed square can't span.
Built-in saw guide fence
The lipped edge doubles as a circular saw fence for dead-square crosscuts without measuring twice.
Etched, glare-free scales
Deep-etched degree and scribe markings stay readable in direct sun and won't wear off in a nail bag.
Lifetime warranty — no receipt
Knocked out of true under normal use? We replace it, no questions asked.
- Can I use it as a saw guide for a circular saw?
- Yes — seat the lipped fence on the board edge, hold firm, and run your saw shoe along the ruler edge for a square cut. It's one of the most common uses for the 12-inch size.
- What does the warranty cover?
- Lifetime warranty. If it fails under normal use we replace it — no receipt, no questions.
- When will my order ship?
- Orders before 2pm ET ship same day from Columbus, OH. Free standard shipping on orders $49+.
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Customer Reviews
316 verified reviews · 4.8 average · based on actual purchases.
4.8
★ ★ ★ ★ ★
out of 5 · 316 Reviews
FD
Mar 7, 2026
★★★★★
Rafter layout tool that takes a beating
Used it cutting rafters on two garage builds. The lip seats solid on the board edge for square crosscuts, and the degree scale made my plumb cuts fast. Dropped it off a second-story deck onto concrete — still true.
✓ Verified Purchase · 45 found helpful
OW
Apr 21, 2026
★★★★★
Saw guide plus layout in one
I use it as a circular saw guide for square cuts on deck boards — hold the fence, run the saw along the edge, done. The 12-inch size covers wide stock that my 7-inch speed square couldn't. Etched markings are easy to read in sun.
✓ Verified Purchase · 30 found helpful
NT
Jun 2, 2026
★★★★☆
Bigger than I'm used to, more accurate too
Bought it for a pergola project. Marking angles on 2x8s was straightforward with the degree scale. It's a big tool for small hands but the accuracy is there — my cuts fit first time.
✓ Verified Purchase · 11 found helpful
