This is a genuine manufacturer-sourced part which is specially designed for Oster food processors. The blade sits on the stem and rotates at the desired speed and chops the contents of the bowl. The blade is made of metal and plastic, it is also sold individually. No tools are required for installation, just slide onto the shaft and lock into place.
This stainless steel shredding disc is an OEM part direct from Oster which was designed for use in food processors to cut and shred a variety of ingredients to a uniform size. No tools are required to replace this part. Simply remove the current disc from the appliance and place the new disc over the motor shaft. The part can be secured in place by pushing down on the rim of the disc. This item is sold individually.