The Shark S-12 Overhead Crown Guard is for the AP254TS/ AT254TS or AP254LTS/ AT254LTS Table Saw. This style of crown guard offers a higher level of user safety and a more efficient dust collection. The heavy duty steel frame, cast joints and high grade alloys make it rigid yet easy to adjust. The large, unbreakable polycarbonate hood gives great visibility for safer use. The hood assembly can be set at any height above the blade through a linear guideway and supporting air strut. When you need to change the blade the whole top arm hinges back to the rear. A must when using a dado cutter head, the crown guard will enhance this table saw, making your work safer and more efficient.