Door Lock Installation Kit takes the hassle out of deadlock and lockset installation. By securing the yellow positioning frame you can then use the hole saws provided to drill perfectly aligned holes, allowing you to then fit deadlock and lockset with ease. The installation kit can be adjusted to fit doors with a thickness of 35- 45mm (1-3/8" to 1-3/4"). Product Includes: 2pcs hole saw: 25mm (1”) & 54mm (2-1/8”) 1pc arbor for hole saw ABS positioning plastic frame Product Specification: Cutting depth of the hole saw: 50mm Shrank size 9.5mm (3/8") Size of the drill: 6x76mm Adjustable thickness of the door from 35- 45mm (1-3/8" to 1-3/4") Hole Saw Blade Material: Carbon Steel