This is a nice unit . As built it works well. but its is not a large milwaukie Mag drill It clamps great. drills very well and the variable speed control is nice. drilling slow is best as it does not burn out the tool. Short comings. the switch for Left and right turn are backwards. Comon issue i guess according to other posts. The standard chuck which comes with it is almost unusable . when you install the chuck. there is no room left for any drill bit of almost any size. this is a huge drawback. you need a 3 inch drill bit. The unit has good power. I was able to drill nice clean holes in thick steel. 1 inch in diameter. with the Annualar bits. These work great actually. The method of holding the annular bits is not the best. It likes to fall out or not engage or disengage easily. While I like the unit. i just wish they had made the vertical travel better as then you could use a normal drill bit. It came with a set of Metric Annular drill bits I need standard ones. The unit functions nice. but just be aware of these shortcommings. Still a nice unit. I do not mind turning the switch left to go clockwise. but other than that just dissapointed I cannot use a standard drill bit . it would be nice to drill a pilot hole occassinally.