Metallics SD12716118 Drill Bit Spiral Flute Step 12 Step 7/16"-1-1/8" (1pc)

The SD12716118 is a 12-step bit covering 7/16 inch up to 1-1/8 inch. Each step cuts a progressively larger hole, so one bit covers the common conduit knockout range on a panel or enclosure without swapping tools.

Yes. The step range runs from 7/16 inch through 1-1/8 inch across 12 steps, so 1 inch falls inside it. Trade sizes above 1-1/8 inch are out of range for this bit.

For thin stock, a step bit like the SD12716118 is the better tool. The stepped profile self-starts, deburrs as it cuts, and gives you 12 different hole sizes from 7/16 to 1-1/8 inch in one bit, which is what you want when punching for connectors in an electrical box, panel, or strut. A hole saw makes more sense in thicker material or for diameters above what the steps cover.

The spiral flute on the SD12716118 clears chips up and out of the hole as it cuts, instead of letting them pack in front of the cutting edge the way a straight flute can. On sheet metal that means a cleaner cut and less grabbing as the bit breaks through.

One bit, supplied in a pouch. It is a single-piece item, not a set, so if you need coverage below 7/16 inch or above 1-1/8 inch you will need an additional step bit in that range.