Number drill sizes
A sizing system for small drill bits. The larger the number, the smaller the bit. A #50 bit, used when installing the ramrod tip, is about 0.070". A #55 bit, used in the pin hole drill jig, is about 0.052".
A sizing system for small drill bits. The larger the number, the smaller the bit. A #50 bit, used when installing the ramrod tip, is about 0.070". A #55 bit, used in the pin hole drill jig, is about 0.052".