These pants are pretty nice and seem to hold up to normal work conditions.  I'm a carpenter and wear these most days.  The hammer loop that's built into these is the worst one I've seen, but if you buy the skillers add on that works with the Velcro on the belt loop it fixes this problem.  These are definitely knockoffs of the skillers  brand and they don't come anywhere near as nice as the original.  The worst thing about the pants are the knee pads.  They pads always end up on the inside of my leg just below the knee and it's incredibly annoying.  I've tried different inseam sizes but it's always the same. If your looking for built in knee pads (I was) DON'T buy these.  Other than that they are decently made and should hold up like a pair of carharts.