Square Manufacturer,Supplier and Exporter in India
Product Code : EL-WT-12998
Jlab Export is a leading Square Manufacturer,and suppliers in India
An engineer’s square checks that two faces meet at a right angle and marks lines square to an edge. This 150 mm square is hardened steel with parallel edges. It is made to grade B, the usual grade for workshop marking out and bench checks.
Specifications
| Material | Hardened steel |
| Edges | Parallel |
| Grade | B |
| Size | 150 mm |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 4–6 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Workshop Practice for Filing and Marking Out
Filing a mild steel block to size is where most fitting courses begin, and the square checks every stage. Students hold the block in the Bench Vice, file a first face flat, then file the next face to it. To test, they press the stock against the first face, lower the blade onto the second and hold the work up to a light. Light under the blade shows the high spots to file next.
For marking out, the stock rests against a finished edge and a line is drawn along the blade with a Single Ended Scriber. Distances along that line are then set off with a Steel Rule, ready for sawing or drilling.
Frequently Asked Questions
What does grade B mean on a square?
Squares are made in accuracy grades. Grade B is the workshop grade, used for marking out and for checking work at the bench. Finer grades are kept for inspection rooms and for checking other squares.
Why do the parallel edges matter?
With parallel edges, both the inside and the outside edge of the blade can be used. You can check an inside corner, such as a step or a slot, as well as an outside corner.
How can I tell if the square is still true?
Hold the stock against a straight edge and scribe a line along the blade. Turn the square over, set it to the same point and scribe again. If the two lines coincide, the square is true; if they spread apart, it is out by half the gap.
How do I look after a hardened steel square?
Keep it apart from heavy tools so the blade is not bent or nicked. Wipe it with a lightly oiled cloth after use to stop rust, and never use it as a hammer, lever or scraper.
Is a 150 mm square the right size for bench work?
A 150 mm blade covers most bench jobs, such as blocks, flat bar and small fabrications. For long edges, use a larger square or check the length with a straight edge as well.
Other Marking-Out and Checking Tools
- Engineers Square (smaller blade)
- Scriber (double ended)
- Square Ruler
- Levels (magnetic box level)
For a quote, use Add To Cart or send us a message through the contact page.
Last updated: 6 November 2026
