Sioux Tools has a great selection of inline and right angle grinders with collet sizes from 1/4'' to 1/2'' & 3 mm 8 mm for a variety of applications. Speeds range up to 25,000 rpm to get the job done quickly and efficiently. Some models offer a choice of throttle control that is most convenient and comfortable for the operator. We also have extended models that fit into tight, hard to reach places. When wheels, pads or other accessories are attached to the spindle, the tool can be used to remove metal or composites in a variety of ways.