The Multimaster doesn't rotate or use a back and forth motion. It oscillates. Oscillation permits you to do extremely fine and delicate work, or be more aggressive, depending on the accessory blade and material.

Fein Electric and Pneumatic Multimaster Tools	Fein Multimaster Sanding Accessories	Fein Multimaster Blades
Fein Multimaster Sandpaper	Fein Multimaster E-Cut Blades	Fein Multimaster Scraper Blades
Fein Multimaster Accessory Kits	Fein Multimaster Dust Collection Accessories	Fein Multimaster Adapters & Wrenches