Starrett STRHS83DC DCH0314 Deep Cut Bi-Metal Holesaw 83mm The Starrett Deep Cut Bi-Metal Holesaws offer aggressive material penetration and kerf clearance. Improved tooth material for enhanced heat and wear resistance and greater product life. Ideal for solid materials or tubes with a wall thickness greater than 3mm. The large cutting depth improves cutting performance on tubes particularly where there is a need to cut through both sides of the tube. Cutting Depth: 51mm. Starrett DCH0314 Deep Cut Bi Metal Holesaw has the following specification: Diameter: 83mm (3.1/4in).