The PCL500 RYOBI 18V ONE+ 5-1/2" Circular Saw Vacuum Dust Adaptor removes dust as it is generated providing an easy to clean workspace. It fits vacuum hoses that are 1-1/4" in diameter to 1-7/8" in diameter allowing for versatility. It is compatible with the RYOBI PCL500. Included in this package is (1) PCL500 RYOBI 18V ONE+ 5-1/2" Circular Saw Vacuum Dust Adaptor.