This is a Genuine OEM DeWalt Part.  

This is Part #5140135-40 Adjusting Block.  This assembly is compatible with several models including:  Table Saw DWE7490 DWE7491 DWE7499.  Please make absolutely sure this part fits your model before purchasing. 

Dewalt DWE7490X-Type-1

Dewalt DWE7490X-Type-2

Dewalt DWE7491RS-Type-1

Dewalt DWE7491RS-Type-2

Dewalt DWE7499GD-Type-1

Dewalt DWE7499GD-Type-2

SPECIAL NOTE:  Our new DeWalt parts are all genuine OEM made for DeWalt service.  None of these are third party, off-brand parts.  We will warrant these parts as new and working upon arrival, however, we will not warrant if you bought the wrong part or damage it during installation, so be careful when ordering and in your self-service.