Johnson Level & Tool 400EM-S Heavy Duty Professional
Inch/Metric Metal Combination Square, 12", Silver, 1 Square
Price as of 2026-06-18. Check Amazon for the current price.
Quick Decision
Is This Right For You?
- •Budget-conscious shoppers — priced below 67% of carpentry squares
- •Johnson loyalists — the brand spans 22 products in our database
- •Swanson Tool Co., Inc SWANSON Tool Co S0101 7 Inch Speed Square offers a better rating (4.8/5) at a similar or lower price ($10)
- •Johnson Level & Tool RAS-70B-ORAN Structo-Cast Rafter Square — 58% cheaper at $6 (Score A)
- •Swanson Tool Co., Inc SWANSON Tool Co S0101 7 Inch Speed Square — higher rated at 4.8/5 ($10)
📊 Based on data analysis of 175 products in this category.
Mubboo Score: A-
How It Compares
This Product Johnson Level & Tool 400EM-S Heavy Duty Professional | Most Popular Swanson Tool Co., Inc SWANSON Tool Co S0101 7 Inch Speed Square | Best Rated WORKPRO Aluminum Alloy Carpenter Square and Zinc-Alloy | Best Value Johnson Level & Tool RAS-70B-ORAN Structo-Cast Rafter Square | |
|---|---|---|---|---|
| Price | $14.19 | $9.98 | $22.99 | $5.99 |
| Rating | 4.5/5 | 4.8/5 | 4.8/5 | 4.8/5 |
| Reviews | 2,220 | 17,198 | 4,001 | 1,262 |
| Mubboo Score | A- | A+ | A- | A |
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Confirm squareness upon arrival; combination squares may need deburring or adjustment. Consider imperial-only marking options if you don't need metric, and Swanson packs include a handy reference booklet.
- Durability and build quality
- Clear and easy-to-read markings
- Accuracy and squareness
- Excellent value for money
- Included instruction booklet
- Unwanted metric scales or logos
- Combination square adjustment issues
- Minor cosmetic defects
Related Video Reviews
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- 📹 Are the Pricey SQUARES Really WORTH IT?? — Jarod Coffman
- 📹 Don't buy any Woodpeckers Squares until you see THIS! — Kings Fine Woodworking
About Johnson
- 22 products in our database
- Average rating: 4.5/5 across all products
- Price range: $5.99 – $1270.99
- Categories: Calculators, carpentry-squares, Laser Levels, plumb-bobs, protractors
Other carpentry squares
Bottom Line
Johnson Level & Tool 400EM-S Heavy Duty Professional earns Mubboo Score A-. Priced at $14 — a budget-friendly option, below the category average of $29. Rated 4.5/5 from 2,220+ reviews. Strong buy if: budget-conscious shoppers, johnson loyalists. Skip if: swanson tool co., inc swanson tool co s0101 7 inch speed square offers a better rating (4.8/5) — Swanson Tool Co., Inc SWANSON Tool Co S0101 7 Inch Speed Square (Score A+, $10) may fit better.
Frequently Asked Questions
Is the Johnson Level & Tool 400EM-S Heavy Duty Professional worth buying in 2026?
It earns a Mubboo Score of A-, with a 4.5/5 rating from 2,220 reviews — better than 45% of carpentry squares we track.
How much does the Johnson Level & Tool 400EM-S Heavy Duty Professional cost?
It is currently $14.19 — budget-tier pricing for carpentry squares.
How does the Level & Tool 400EM-S Heavy Duty Professional compare to other carpentry squares?
The category's most-reviewed alternative is the Swanson Tool Co., Inc SWANSON Tool Co S0101 7 Inch Speed Square (4.8/5, 17,198 reviews, $9.98). The Level & Tool 400EM-S Heavy Duty Professional carries a Mubboo Score of A- vs A+.
Sources & References
Mubboo may earn a commission from purchases made through links on this page. Prices and availability are accurate as of the last sync (2026-06-18) and may change.