Notes on Power Tool - Bosch model name explained.

https://en.wikipedia.org/wiki/Wireless_powerline_sensor

https://www.jameco.com/Jameco/workshop/jamecofavorites/non-contact-AC-voltage-detector.html

https://www.mdpi.com/1424-8220/19/8/1812

https://www.bosch-professional.com/gb/en/community/category/gsb-180-li-vs-gsb-18-v-ec/14461550-t#/main

More important "soft" torque is higher in both the old and new GSB 18 V-EC models compared to the GSB 180-LI. 

The max torque is a hard joint, for example if there are two similar drills, one with a light plastic chuck and the other with a "heavier" metal. The metal chuck drill usually has a higher "hard/max" torque.  

Also the weight differences between the carbon brushed electric motor and brushless. ( rotating masses )

I would buy a cheaper model if the price difference is significant. 

https://www.bosch-professional.com/gb/en/community/category/why-the-different-professional-range/385576-t#/main

Very confusing model name / brand code

https://www.youtube.com/watch?v=_d6YmkAX1WM

18V-LI is cordless mean have brush (carbon)

GDR 180-LI is brushless => No it's brushed dawg.

It seem Brushless model have it on stamp marker already. Like this one GDS 18V-EC 300 ABR.

Otherwise it is brushed.

This shit can drill thin metal box but with big hexa auto drill.

This is cheap one, seem similar Bosh GSB 180 LI (and seem cheaper).

On real drill, it seem quite difficult for drill small hold (around 5mm) onto thin metal (like window) but hard steel.

And the biggest issue is that, I have to drill window onsite, not a metal box lay on floor, so the space for work not easy. With small auto drill it is too difficult to penetrate hard steel (even though it only few millimeter).

And drill small hole on concrete.

May be my bit and drill tip issue. Will check later.

Some cool stud finder

https://walabot.com/diy

https://www.aliexpress.com/item/1005001512872233.html?spm=a2g0o.productlist.0.0.337b76b2QW1wf7&algo_pvid=b94869eb-e1af-4af7-a20e-af343ebc267f&algo_expid=b94869eb-e1af-4af7-a20e-af343ebc267f-3&btsid=0bb0623916068089264222017e22a5&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

Recommend and compare some stud finder

Using stud finder correctly

UNI this brand make Digital meter, USB current, voltage meter... Not sure this one work, it quite expensive in Vietnam (normal stud finder available for around $25)  but available in local E-Commerce.

So it seem these bellow item are good one:

1. Zircon StudSensor e50: https://amzn.to/2DmWsm6  3/5 rating. cheap (25$) but not available in Vietnam, Aliexpress...

2. Walabot DIY: https://amzn.to/2Guzlb7

This one is cool cost around 50$ but I can not found it. It seem there are many variant and cost 200-1000$ Aliexpress have one but seem not full cased and ready to work. The Amazon one too expensive to ship to VN (34$).

https://fado.vn/us/amazon/walabot-diy-stud-finder-in-wall-imager-cell-phone-wall-scanner-for-studs-pipe-and-wires-only-compatible-with-android-smartphones-running-versions-60-or-above-B06Y29NXKK.html

http://www.clzc.com/en/index.php

https://youtu.be/UkPzjV-ZaTU