... No:ST0004-B3 2.5pcs Diamond Bit Set with Universal Guide 3.size:dia.4/6/8/10/12mm We have ... , like dies, taps, hss or carbide end mills, counter sinks, step drills, cobalt drills, hobs, reamers, etc. We have 18 years ... , the USA and Australia 5pcs Diamond Bit Set with Universal Guide dia.4/6/8/10/12mm