12″ Long HSS Drill Bit For Drilling Out Golf Shafts – For Steel & Graphite This 12″ long drill bit is a handy, must-have tool for any club builder’s shop. Attach to any drill for cleaning old epoxy from shafts that have been previously installed to prep them for re-installation. Specifications: – 6mm for steel / 3.5mm for graphite shafts – Made of HSS (high strength steel) – Twist design for easy drilling #1 Online Source For Golf Club Components