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: https://www.amazon.com/gp/product/B0002438LM/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1***