• strong one piece molded body. • hexagonal ss through shaft for positive disc support and rotation. • smooth and strong pp disc. • safety lock to prevent unauthorized operation. • intermittent locking provision for positive poisoning of the disc. • full body linear seat. Avoids flange gaskets. • hand operated version with ergonomic handle made up of abs material. • oval holes to fit with different flange standards. • sizes available :3”(90mm), 4”(110mm)