I am a full time maintenance rookie at a Christian camp and this is an excellent tool! When you're in demand of a driver/doing multiple jobs and have to be time efficient, the Irwin 9-1 is extremely useful. No more running back and forth to the truck for different drivers or sizes. 99 times out of 100 this driver will have what you need to get the job done which makes for efficient work especially in a demanding maintenance type job. Also makes a good tool for home. Well worth the money!