High Quality Material The hole saw kit is made of excellent quality high power carbon steel. Having high speed steel teeth which are useful for fast and fine cuts. The most important thing is that it has exclusive gear designs which provide the best quality service to perfectly create different holes.Perfect for making a hole This is an all in one productIt is amazing, you can make holes as you need. It is high precision, power resistant, wear resistant, creating smooth cutting edges.Suitable for various materials It will be a great help for use on normal wood , plastic and thin PVC panels. The hole saw kit has powerful cutting force and great durability for long term use.Convenient to work This is a hassle-free and securely organized product that is protected in a handy plastic storage case. So you won't have any problem doing your work with the mandrels and the installation plate and you can easily store them for next use.All the sizes you need This amazing product contains all The sizes: 3/4 '(19 mm), 8/9' - (23 mm), 1 '(25 mm), 1-1 / 8' (28 mm), 1-1 / 4 '(32 mm), 1- 1/2 '(38 mm), 1-3 / 4' (44 mm), 2-1 / 8 '(54 mm), 2-1 / 2' (64 mm), 3 '(76 mm), 3 -1 / 2 '(89 mm), 4' (102 mm), 5 '(127 mm) including mandrels (2), installation plate (1) and plastic case (1).