Spider 1″ Step Drill Bit

Finally: A formidable step bit designed especially for security installers!

You won’t find an installer who hasn’t accidentally drilled an over-sized door contact hole using a step bit… or at least witnessed a colleague do it.

Why? Their step bit was excessively large, and they drilled too far in using it.

Our Spider Security Step Bit goes up to an inch. Not 7/8” or 1-3/8”… common sizes sold at hardware stores that cause TROUBLE for installers.

This tool drills PERFECT ONE INCH HOLES for Door Contact Sensors!

With this, security installation companies and building owners alike can relax knowing that installers can no longer inadvertently over-drill holes too large – Which literally compromises door frames and voids fire ratings.

This is the right tool for the job!

***UPDATE February 2021: This product has been discontinued. However an equivalent product can be found on Amazon:***


Out of stock

SKU: SSP-ACC-STEP-001 Category:

Drill mistake-free door contact sensors easier than ever with this SPIDER STEP BIT. And use it along with the SPIDER DRILL SHIELD* for the ultimate one-two punch!


  • 9/16”
  • 5/8”
  • 11/16”
  • 3/4”
  • 13/16”
  • 7/8”
  • 15/16”
  • 1”

Main Features:

  • Deburrs Itself
  • Split Point Pilot Tip
  • 3/8” Diameter Shaft
  • Longer Shaft Drills Deeper
  • For Aluminum & Steel Metals
  • Anti-Rust Inhibitors
  • Dual Cutting Design
  • ‘Drill Shield’ Compatible

We’ve built this of ‘Molybdenum 7’ one of the hardest steels available (and with a melting point of over 4,500°F).

Even against the rigors of construction, this bit is UNBREAKABLE!

(Always use 1/4” to 3/8″  Pilot Bits and Cutting Oils to prolong the effectiveness of any step bit.)

Made in the USA!
Lifetime Warranty!**

* Spider Drill Shield sold separately.
** Warranty applies against breakage only, and under normal use.
*** This quality product is proudly made in the USA.

Product Datasheet

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