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Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Pouch
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
Metallics SD78 – Frequently Asked Questions
1) What hole sizes does the Metallics SD78 step drill bit cut?
The SD78 is a 3-step bit covering 7/8 inch through 1-1/8 inch. Those are the sizes that matter for conduit knockouts in sheet metal enclosures, so one bit handles the range rather than swapping three twist bits.
2) Is the SD78 the right step bit for enlarging an existing 7/8 inch knockout?
Yes. Because the smallest step on the SD78 is 7/8 inch, it starts in an existing 7/8 inch hole and steps it up to 1 and then 1-1/8 inch. For a hole smaller than 7/8 inch you need a step bit whose first step is below your starting diameter, since the SD78 has nothing under 7/8.
3) Step drill bit or hole saw for conduit holes in a panel?
For thin material like enclosure walls, device boxes, and strut, a step bit such as the SD78 self-starts, deburrs as it steps, and gives you three diameters from 7/8 to 1-1/8 inch in one tool. A hole saw is the better choice in thicker stock or wood, where the step geometry runs out of depth and a saw cuts the full thickness at one fixed diameter.
4) How many pieces come in the Metallics SD78 step bit pack?
One bit per pack, supplied in a pouch. If you are outfitting more than one electrician or truck, order a unit per tech.
How fast can I get the Metallics SD78 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Metallics SD78 come with a warranty?
Absolutely. The Metallics SD78 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Metallics SD78?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics SD78 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.