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The 5/16” x 5” in. Safe Bit features a special 7.9 mm Tungsten Carbide tip with a unique negative rake angle and a shortened chisel edge that increases it’s effectiveness and reduces tip failure. Each PRO-LOK® Butter Bit is diamond ground for razer sharpness to withstand the rigors and temperatures a locksmith may encounter when drilling hardplate for entry into a safe.
Manufacturer Resources
Product Specs
- Subcategory:
- Locksmith Tools
- Product Subgroup:
- Locksmith Tools
- Product Type:
- Safe Bits
- Product Category:
- Safe Bits
- Department:
- Door Hardware
Pro-Lok SB11 – Frequently Asked Questions
1) Why does the Pro-Lok safe bit have a negative rake angle instead of a standard drill point?
Hardplate chews up conventional drill points. The negative rake angle on the SB11 tip, combined with a shortened chisel edge, keeps the carbide edge supported under load so it cuts hardplate instead of chipping out. Pro-Lok grinds it that way specifically to reduce tip failure.
2) Will a 5 inch safe bit be long enough to get through a safe door?
The SB11 gives 5 inches of overall bit length, which covers typical drilling through hardplate and into the lock area on many safe doors. On deep composite or thick-bodied doors you may need to step to a longer bit or open up the hole behind the plate; check your drill point depth before committing.
3) Do I need to sharpen the Pro-Lok SB11 before using it?
No. Each Pro-Lok Butter Bit ships diamond ground to a sharp edge and is ready to drill out of the package.
4) Is the Pro-Lok SB11 the same thing as a Butter Bit?
Same bit. Pro-Lok markets this carbide safe bit line as the Butter Bit, and SB11 is the 5/16 inch by 5 inch model within it. Order by SB11 to get that size.
5) Can I run this safe bit in a cordless drill?
Carbide safe bits like the SB11 are meant to be run slow with steady pressure in a rigid setup, normally a drill rig clamped to the safe door. High speed or a hand-held drill that wanders is what breaks carbide tips, and this tip is ground the way it is specifically to resist that failure.
How fast can I get the Pro-Lok SB11 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 Pro-Lok SB11 come with a warranty?
Absolutely. The Pro-Lok SB11 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 Pro-Lok SB11?
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 Pro-Lok SB11 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.