Oscillating multi-tool

This type of oscillating tool was originally developed by the German manufacturer Fein in 1967[1] with a design intended to remove plaster casts easily without cutting the patient.

The small form of these tools and the ability to mount the blade or accessory in any orientation allows cutting in areas that are otherwise virtually unreachable.

The ability to cut a complex or precise recess without the need to remove the work piece from where is it fixed greatly increases productivity.

The angle of oscillation creates increasing friction further from the center of the tool as these areas travel a greater distance.

The increased friction is particularly apparent with the triangular sanding and grinding attachments which allow the operator to reach into corners and confined spaces, a feature unique to this type of power tool.

The blades can be separated into 5 main categories: cutting; tile, grout and masonry; sanding; scraping; and polishing.

Many after-market blade companies have created universal arbor attachments that are compatible with most, but not all, oscillating multi-tool machines.