Unlike their previous Mag Booster plastic which was fantastic this one is terrible. In fact, don't even bother. First, most bits don't even fit in. It doesn't have a standard hex shank hole but instead has 3 retainers in a fairly small hole. I'm struggling to find anything that even went through the retainers. Also, they don't hold long shots well. When they match, the center of gravity is shifted, and this causes terrible wobbling during movement. The detents only work on the shank, and longβ¦