Boor Peghole 10mm

High-quality countersink in three sizes selected for our purposes. The sizes 6.3mm and 8.3mm are very well suited for enlarging too narrow potentiometer holes (e.g. for US potentiometers). While heavy damage can be caused quickly with a twist drill, the 10mm countersink makes it possible to drill even tuner holes that are filled with varnish to the 10mm diameter needed for most tuning machines. Simply drive the countersink as far into the hole as necessary.