This little gizmo helps by not having to replace fuses if some thing goes wrong (which it hasn't) or to isolate power source to certain areas.

Over all they are alright but if you do get them i dont recommend you tighten them very much because i have had the bolts break on me. I dont like the idea that most of it was made of plastic because i had the piece to pop the breaker break and then i could no longer use it.

This breaker is cheaply built. I the knob eft off as soon as I open the package. Then the breaker trips well below the 200 amp rating. I could not even use these. I was stuck with two of them. DO NOT Wate you money.

Why buy fuses when you can just get a circuit breaker?! For what it is it works fine. Standard circuit breaker.

This product is your general circuit breaker. Why would people buy loads of fuses and have to replace them everytime they blow, when they can just get one of these and never have to buy another fuse in their life? I would highly suggest circuit breakers to replace all of your fuses.