1、Excellent Carbide Material: This hole cutter is made of excellent TCT carbide material, which ensures its high hardness, rust resistance, and durability. 2、Triple Flute Design: This hole cutter features a triple blade design that includes an outer blade, a center blade, and an inner blade, making it more incisive, more efficient, and perfect for cutting through hard metals. 3、High Accuracy: This hole cutter cuts with high accuracy and speed and is suitable for hand held electric drills, vertical electric drills, and mobile banded magnetic drilling machines. 4、Wide Application: This hole opener is suitable for bench drills, magnetic drills, gun drills, impact drills, etc. It is very suitable for hard metals, stainless steel plates, square pipes, iron, cast iron, wood, fiberglass and other general plates. 5、Multiple Sizes: This hole cutter set comes in multiple sizes, which can meet different needs, you can choose to use it according to your needs. Item Type: TCT Hole Saw Set Material: Carbide Opening Diameter: 16mm, 20mm, 22mm, 25mm, 30mm, 32mm (5/8 Inch, 25/32 Inch, 7/8 Inch, 1 Inch, 1 1/4 Inch, 1 3/8 Inch) Opening Depth: 25mm ( 1 Inch ) Shank Diameter: 3/8 Inch 6 x Carbide Tipped Hole Cutter 2 x Hex Wrench 1 x Storage Box