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The 3/16” x 3-1/2” in. Safe Bit features a special 4.8 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 SB01 – Frequently Asked Questions
1) What is the Pro-Lok SB01 safe bit used for?
Drilling hardplate to open a safe. The SB01 is a 3/16 inch diameter bit with a 3-1/2 inch overall length, tipped with tungsten carbide so it can cut the hardened plate protecting a safe lock without the tip breaking down from heat. It is a locksmith entry tool, not a general-purpose masonry or metal drill bit.
2) Why does the Pro-Lok safe bit have a negative rake angle instead of a standard drill point?
Hardplate is abrasive and work-hardens fast, and a conventional positive rake carbide tip chips on it. The SB01 uses a 4.8 mm tungsten carbide tip ground with a negative rake angle and a shortened chisel edge, which puts the cutting force into compression on the carbide rather than trying to peel a chip. That is what keeps the tip from failing partway through a plate.
3) Which Pro-Lok safe bit model is the 3/16 inch by 3-1/2 inch size?
Model SB01 is the 3/16 inch diameter, 3-1/2 inch length bit in Pro-Lok's safe bit line. That single model code is how the size is ordered.
4) Will a 3/16 inch safe bit drill deep enough to reach the lock, or do I need a longer bit?
The SB01 is 3-1/2 inches overall, and that length includes the shank held in the chuck, so usable depth is less than 3-1/2 inches. For a typical single hardplate barrier it reaches; for a deep composite door or a scope hole through thick relockers, plan on a longer bit in the same series. Match the small 3/16 inch diameter to a pilot or scope hole rather than a large clearance hole.
5) Is the 3/16 inch Pro-Lok safe bit sharp out of the box or does it need dressing first?
It arrives ready to cut. Each Pro-Lok Butter Bit is diamond ground to a razor-sharp edge before it ships, so there is no initial dressing step before you go into a plate.
6) Can I run the Pro-Lok safe bit in a cordless drill?
Carbide on hardplate wants slow, steady speed and heavy, constant feed pressure, which is why locksmiths mount these on a rigid drill rig rather than freehanding a cordless. A high-RPM cordless drill and an unsupported bit is how a 3/16 inch carbide tip gets chipped. The bit itself is built for the heat and load of hardplate drilling; the setup around it is what decides whether it survives.
How fast can I get the Pro-Lok SB01 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 SB01 come with a warranty?
Absolutely. The Pro-Lok SB01 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 SB01?
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 SB01 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.