Uxcell Metal Cutting Hole Saw Drill Bit Set with Hex Wrenches, 30MM This 30MM Hole Saw provide good strength and great wear resistance. Used to drill large diameter holes, usually through thin metal boards. Diameter of the Drill Bit Hole Saw: ~1 3/16inch (30mm) Color: Black & Silver Tone; Total Weight: 84.2g Package include: 1 x Hole Saw; 1 x Shaft; 1 x Twist Drill Bit; 1 x Hex Wrenches