Features: Package Include:4 standard plug cutters and 4 four-tooth chamfered cutters. Tail diameters size : 6mm(1/4"), 10mm(3/8"), 13mm(1/2") and 16mm(5/8"). The product is in metricsize, and inches isconverted. Please confirm the product size before purchase it. The drill bit set is suitable for various drill with round shank, such as benchdrill, electric hand drill, handhelds drill. We highly recommend use on drill press, easy to center Perfect wood plug cutter set makings perfect plugs for counter-bored holes, suitable for benchdrill and hand drill. Standardhex shank is quick changes compatible. Specifications: Material:StainlessSteel Color:Silver,Black Package Includes: 8Pcs Wood Plug Cutter Drill Bit note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.