SOG Knives Contractor Series of Folding Pocket Knives
SOG Knives has had a contractor’s knife for several years.  SOG has recently expanded the selection with some very useful and economical models.  You can see them at
Here is more description from SOG Knives:
A craftsman is only as good as his tools. For almost 25 years, SOG has been a leading supplier of knives and tools to the industrial, contractor, and DIY markets. The reason is simply that our products are tough and we stand behind them with lifetime guarantees. The Contractor series is designed specifically for tradesmen, including electricians, handymen, and for those who take pride in a job well done. The Contractor series of knives is a great collection of good quality folding utilitarian pocketknives.