Kapro 325M Magnetic Lock Combination Square w/Zinc Head

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Kapro 325M

The iconic Kapro 325M MAGNETIC LOCK Combination Square innovates away the common locking nut with strong magnets that hold the ruler instead. It means that you don’t have to hold the precise measurement steady as you tighten the nut and, of course, don’t have to loosen it when you’re done. You simply push and pull the ruler through the square head’s magnetic field. The magnets create a strong resistance to movement so you can be confident that the ruler will stay where you set it. The magnets hold the sharp scribe in place if you choose to score the work instead of marking it.


Registering and transferring measurements from the board to blade/bit or board to board was never easier; the ruler is made of stainless steel and is permanently etched in inches and centimeters.

The Kapro 325 Provides 5 milled sides for superior accuracy and includes easy grip magnet-held stainless steel scribe, easy to read vial, and belt holster.


Click to view Product Manual

  • INCREMENTS ➤ 1/16“ and millimeters
  • PERMANENT ➤ Etched markings resist wear
  • SCRIBE TOOL ➤ Housed magnetically in head
  • Ruler length: 12"
  • MILLED ➤ 5 Finely milled sides for superior accuracy
  • MAGNETIC ➤ Slide ruler through magnetic field for easy adjustment

What does the lifetime vial accuracy warranty cover?

The lifetime vial accuracy warranty covers the part of your vial, not the whole level.

Please note that only solid acrylic vials are covered under the lifetime warranty. Cylindrical vials are covered for 1 year - frame damage voids the warranty.

Should your vial fail due to factory defect, Kapro will either replace the level or offer MSRP value in the form of a coupon to use here on ShopKapro, depending on availability - discontinued items are not eligible for exact replacement.

The warranty does not cover damage to the level from misuse, abuse, or accidental damage.

Should the vial fail due to frame damage, warranty is voided.

If my frame is damaged, will it be covered under warranty?

No, the lifetime vial accuracy warranty only covers the part of the vial for factory defects.

Frame or milled surface damage from misuse, abuse, or accidental drops and falls void the warranty on the vial.

Are cylindrical vials covered under the lifetime vial accuracy warranty?

No, cylindrical vials are only covered under a 1 year limited warranty - Frame damage voids warranty.

Shipping Policy

Orders will be shipped via our preferred carrier(s) - Ground service only


All orders under $30 will be charged a $7.00 flat shipping fee

All orders will be shipped within 2 business days from receipt of order
notification email

Allow 5-7 business days for delivery


All orders will be charged a $25.00 flat shipping fee

All orders will be shipped within 2 business days from receipt of order
notification email

Allow 7 - 10 business days for delivery

Return & Exchange Policy

Made a purchase error- no worries:

100% credit will be issued via the original form of payment if the item is
returned within 30 days of invoice date and the item is received back
in the condition it was originally shipped, including all components and

Cost of returning the product is at your expense.


Have a damaged or defective product? Or just need a replacement part to
bring it back to working order? 

Contact our Customer Service staff at 888-4LEVELS or kti@kapro.com for the best handling.
However please see our warranty statement for more information.

Please do not make any returns without prior authorization! 



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