I've owned Cats in the past and they work well for light construction work around the house or landscaping but due to the lack of a proper safety toe these are not meant for anything such as medium to heavy construction work involving materials of 100lbs or more.  At the listed price of $60 ($40 off) these are priced more for someone wanting to make a fashion statement.  If you're looking for good quality work boots then Timberland Pro, Red Wings, and Wolverine work boots are your better bet and look into the composite safety toe models to save on weight and still maintain the same level of safety as a steel toe.  Timberland Pro line also has boots for specific trades such as welding with high temp soles.