Simply drill a hole slightly larger than the outer diameter of your via of your choice and insert the via. Via can be easily sharpened if needed to the desired length and punched in the middle on the axis side of the circuit board to spread that side of the shaft. After this, it can be soldered into place or whatever you want to do. Alternatively, you can choose to even pre-grind the head and you will only be left with an extremely discreet shaft. If you want to sharpen it, you can use sandpaper or a rotary tool., Manufacturer: ljhnba