Wel-Bilt 21403 Owner's Manual page 5

You will need to select the appropriate disc depending on the type of material you are
grinding.
When grinding, do not force the Angle Grinder. The weight of the Angle Grinder itself should
provide all the force that is required.
If the tool slows significantly, lift it away from the surface to allow it to regain speed.
Continuous use at lower speeds will result in permanent damage to your tool.
ASSEMBLY
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