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The hole in t-shank tools

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si Offline lister

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The hole in t-shank tools
on: January 31, 2026, 10:48:48 AM
I ordered replacement t-shank saw and file from leatherman. They both now have a hole in the t-shank part. What's the purpose of that? They didn't have it when I first bought the wave long time ago...  :pok: :think:
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fi Offline Antti Lammi

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Re: The hole in t-shank tools
Reply #1 on: January 31, 2026, 12:25:01 PM
I think that those holes are only for notch on holder. It helps keep blade in place bit better.
Im not sure is that only gen2 Surge thing
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us Offline powernoodle

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Re: The hole in t-shank tools
Reply #2 on: January 31, 2026, 01:00:00 PM
AI lies to me all of the time  :ahhh, but here is what Perplexity says:

1. Retention and locking

Many jigsaw clamps use a spring-loaded detent or pin.

The hole gives that pin a positive engagement point, preventing the blade from sliding out under vibration.

This improves axial stability compared to relying on friction alone.

2. Compatibility across brands

The hole allows blades to work with older or proprietary clamp designs that require a locating hole.

It increases backward compatibility without changing the T-shank geometry.

3. Manufacturing and handling

During production, the hole is used to:

Hang blades for heat treatment, coating, or packaging

Aid in automated feeding and alignment

This reduces handling defects and keeps costs down.

4. Blade orientation reference

Some machines use the hole as a datum point to ensure consistent blade seating depth.

This helps maintain accurate stroke alignment.
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si Offline lister

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Re: The hole in t-shank tools
Reply #3 on: January 31, 2026, 01:13:10 PM
Ok, the improved locking (both answers made this point) and holes being used during manufacturing make sense to me.  :tu:
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fr Offline Nonaute

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Re: The hole in t-shank tools
Reply #4 on: January 31, 2026, 09:07:51 PM
Doesn't this hole weaken the tool ?
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us Offline Vadim

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Re: The hole in t-shank tools
Reply #5 on: February 01, 2026, 07:33:57 AM
 :iagree:

si Offline lister

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Re: The hole in t-shank tools
Reply #6 on: February 01, 2026, 09:07:25 AM
Most likely.  :iagree:
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us Online Sven34

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Re: The hole in t-shank tools
Reply #7 on: February 01, 2026, 07:26:53 PM
The blade with the hole would only be weaker if you were using the end of the blade with the hole for prying, which is not what the blade was designed to do.

Removal of material does not inherently reduce strength -- if that were the case the industrial steel "I"-beam would never have come into being.  Tools are designed for particular uses, and are engineered to those ends.

us Offline Vadim

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Re: The hole in t-shank tools
Reply #8 on: February 01, 2026, 11:59:45 PM
Making a hole at the attachment point is not a smart move and design, it is the weakest point and is especially stressed when used sideways, as is usually the case with a file.

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