Ceramic handle how to choose the correct screw length

Metal polishing base has been implemented, address: AngYi fishing cross the village ( Wood group for land) Polishing machine number 800, now the relevant matters: - ->
ceramic handle how to choose the correct screw length

we must first look at the board thickness, in choosing the length of the screw, wood is 1. 8 cm screw length is 2. 2, the board thickness of 2. 0 cm, screw length is 2. 5, 2 board thickness. 5 cm, screw length 3. 0 cm
this is ceramic handle how to choose the correct screw length.