Metallics HSD1 High-Speed Twist Drill 1/16 1-7/8" (10pcs)

The HSD1 is a 1/16 inch high-speed twist drill with an overall length of 1-7/8 inches, sold 10 bits to a pack. The small diameter suits pilot holes for sheet metal screws, device-plate and bracket mounting, and starter holes in thin steel, which is why it ships as a multi-pack rather than a single bit.

Order it as Metallics HSD1. That single part number covers the 1/16 inch by 1-7/8 inch high-speed twist drill in the 10-piece pack, so there is no size or length option to specify on the order.

A 1/16 inch bit is the usual pilot size for the smallest sheet metal and self-tapping screws, and that is the size and the application the Metallics HSD1 is built around. For anything larger, such as 1/4-20 machine screws or anchors, step up to the matching pilot diameter for that fastener instead; this bit only drills 1/16.

No. At 1-7/8 inches overall, only part of that is flute length, so usable depth of cut is well under an inch and a half. It is a short-length bit for sheet steel, device boxes, straps and brackets. For drilling through a deep strut channel stack or down inside an enclosure, you need a longer aircraft-length or extension bit in the same 1/16 diameter.

It comes in a pouch, 10 bits per pouch. That is handy for stocking a van or a pouch pocket rather than a bulk case, and it matters with a 1/16 inch bit, which snaps more readily than a larger shank, so having spares on hand keeps a job moving.