NEW Goldo WS10S Triple Edge Countersink Bit 10mm for Enlarge Tuner Holes

While heavy damage can be caused quickly with standard drill bits, the Göldo 10mm Triple Edge Countersink bit (MFG#WS10S) makes it possible to open up/widen pre-existing tuner holes, even those filled with varnish, to the required 10mm diameter needed for most tuning machines. Simply drive the countersink as far into the hole as necessary.