This countersinking tool is designed to fit exactly into the countersunk screw by adjusting the position of the brass stopper to the desired depth.
According to the method of use, vertical sinking processing is possible even for the brake plate that has been machined at an angle.
It does not require the use of power tools and can be done by hand.
If it does not fit smoothly into the hole of the overlapping part with instant adhesive, you need to re-drill it with a 2.1 drill and then process it.
(If the guide is inserted too tightly, it may cause damage.)