<p>That’s a <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=2351#T=C" rel="noreferrer">crane-arm centre</a>. It’s usually used in non-Technic sets together with the <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=2350b" rel="noreferrer">crane-arm outside</a> to obtain a telescopic arm, e.g., for cranes or firefighter ladder trucks. The slit at the end is to insert a piece of string for using it as a cable crane.</p>

<p>Here's a picture showing this piece in use as the boom of a crane from 4552:</p>

<p><a href="https://i.sstatic.net/Yv5lP.jpg" rel="noreferrer"><img src="https://i.sstatic.net/Yv5lP.jpg" alt="4552"></a></p>

CC BY-SA 3.0
2017-11-08T15:22:45.517Z
Great! Thanks very much. I shall see if I have the rest of it lurking in my pile of bits
Karl Johnson
CC BY-SA 3.0
2017-11-07T14:05:51.407Z
2017-11-07T20:53:27.973Z
2017-11-07T20:53:27.973Z
Wrzlprmft
<p>I have a large collection of parts and I came across this slightly chewed, possibly Technic, part. No numbers on it, just the Lego on the studs. It's 15 Technic holes and then a T-piece on the end with 2 studs either side. The head seems to have a slot through it. Any ideas?</p>

<p><a href="https://i.sstatic.net/3KlYU.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/3KlYU.jpg" alt="Part"></a></p>

<p><a href="https://i.sstatic.net/13xk7.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/13xk7.jpg" alt="Part"></a></p>

<p><a href="https://i.sstatic.net/NlVvn.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/NlVvn.jpg" alt="Part"></a></p>

CC BY-SA 3.0
2017-11-13T16:49:40.727Z
It looks like your questions was answered. Don't forget to mark the best answer if you feel it is correct.
VolleyJosh
<part-identification>
Help identifying unusual Technic part, long beam with 4 studs on end
Karl Johnson
# Help identifying unusual Technic part, long beam with 4 studs on end

(Asked by: username_0 on 2017-11-07)

I have a large collection of parts and I came across this slightly chewed, possibly Technic, part. No numbers on it, just the Lego on the studs. It's 15 Technic holes and then a T-piece on the end with 2 studs either side. The head seems to have a slot through it. Any ideas?

[![Part](https://i.sstatic.net/3KlYU.jpg)](https://i.sstatic.net/3KlYU.jpg)

[![Part](https://i.sstatic.net/13xk7.jpg)](https://i.sstatic.net/13xk7.jpg)

[![Part](https://i.sstatic.net/NlVvn.jpg)](https://i.sstatic.net/NlVvn.jpg)

**Tags:** part-identification

> **Comments:**
> **username_1**: It looks like your questions was answered. Don't forget to mark the best answer if you feel it is correct.  

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## 1 answers

### Answer by username_2 on 2017-11-07. Score: 9

That’s a [crane-arm centre](https://www.bricklink.com/v2/catalog/catalogitem.page?P=2351#T=C). It’s usually used in non-Technic sets together with the [crane-arm outside](https://www.bricklink.com/v2/catalog/catalogitem.page?P=2350b) to obtain a telescopic arm, e.g., for cranes or firefighter ladder trucks. The slit at the end is to insert a piece of string for using it as a cable crane.

Here's a picture showing this piece in use as the boom of a crane from 4552:

[![4552](https://i.sstatic.net/Yv5lP.jpg)](https://i.sstatic.net/Yv5lP.jpg)

> **Comments:**
> **username_0**: Great! Thanks very much. I shall see if I have the rest of it lurking in my pile of bits  

---

