Our shop was broken into this week. They broke the front door-window but it has bars so they could not get in. So they broke my office window "no bars". They got in but the alarm went off and they ran. They did not get anything but we are just really lucky. The police sub station is 1/4 mi from our shop, the cop who was there told me he was there in 30 seconds after the call. The only advice I could give is if you have a shop bar up your windows. Our widow bars are held on by 3/8" red heads in concrete.