Check the listing for details. 30 Small Drill bits & Machinist's Taps--Gunsmithing?. Condition: Used. Listed at 22.00 USD. All 4 appear to be new & unused. If the bits are marked, I can't see what they say. Randomly checking a few with a caliper shows. 032" to. 061". They're about 1.5" long. The Blue & Yellow tube has 14 bits.