Reddit reviews IIT 21270 Brass Center Punch, 5", Automatic
We found 4 Reddit comments about IIT 21270 Brass Center Punch, 5", Automatic. Here are the top ones, ranked by their Reddit score.
Brass body is 1/2"Spring loadedIdeal punch for marking holes on metals, plastics and woodOverall length: 5″Carbon steel tip
the porcelain is much harder than the glass. Once tempered glass takes more than around 15000 psi it shatters. The porcelain does that in an incredibly small area. It does not work on regular glass or laminated glass (front windshield)
edit:adding this is what he should have used. Also cars with power windows should have these in case you drive into the water.
just fyi, all those window break tools are grabage, if you want to ensure you break the window quick and easy, get one of these.
Source: My 50 year old uncle who has been in the auto glass business since he was 17, he bought everyone in the family one of these for christmas, years ago.
https://www.youtube.com/watch?v=l6C5Ytc5Soc
https://www.youtube.com/watch?v=1yHlI_8TGA4
Also pick up a center punch. Just put the point on the center of your hole and push - it's spring loaded and makes a neat little indentation. Just center punch all your hole centers and grab your drill. This is also a couple bucks at harbor freight.
http://www.amazon.com/SE-Center-Punch-Automatic-Brass/dp/B003DW8OCI
$6.30 on amazon. Place the punch about 1/2mm from the edge of the faceplate and punch at the stake position on the castle nut. Actuate punch 5-6 times.
Done.