Ingco HSS Metal Drill Bit 9mm, 10-Piece Set (DBT1100903)

Our review

This is a ten-piece pack of Ingco high-speed steel drill bits, each 9mm in diameter, listed under model DBT1100903. Buying the same size in bulk suits anyone who drills 9mm holes often, such as a workshop fitting bolts, a fundi working with steel, or someone who keeps snapping single bits and would rather have spares on the shelf. Before ordering, confirm your drill chuck or bit holder accepts a 9mm shank, and check whether your material is mild steel, stainless or something harder, since HSS behaves differently across those. Compare against cobalt or titanium-coated bits if you drill stainless regularly, and against cheaper carbon steel sets if your work is mostly wood. Also weigh a ten-pack against a mixed-size set, which covers more jobs but gives you fewer replacements in the size you actually use. The listing gives no coating, point angle or shank details, so ask the seller on Sokonia if those matter for your job.