Drip Rack,Lab Dry Rack,Dry Cleaning Racks,Stainless Steel Drip Rack NARWILL IMPORT&EXPORT CO.LTD , https://www.narwill.com Broaches are tools used to machine various shapes of through holes or outer surfaces in large or batch production. The use of broaching is characterized by high production efficiency and high quality machining surfaces and dimensional accuracy. The rectangular square hole of the waveguide flange produced by our factory is processed by a rectangular broach. The rectangular square hole size of the flange is as follows: