The CRAFTSMAN 4 3/8-inch recessed lighting installation kit includes the accessories needed for installing recessed lights in drywall or plaster. The kit is designed for installing 4-inch recessed lights that require a 4 3/8-inch hole. The included 4 3/8-inch hole saw with arbor features a segmented carbide grit cutting edge for fast drilling through hard, abrasive material. The included dust shield collects debris while drilling overhead for improved visibility and a clean workspace.