Power Through Concrete: Why Relton PMX Bits Are the Heavy-Duty Standard
If you’ve ever felt your teeth rattle while a standard masonry bit chatters against a piece of hidden rebar, you know that not all "hammer bits" are created equal. When you are staring down a slab of high-PSI concrete or a bridge deck, you don't need a hobbyist tool—you need the Relton PMX series.
At MutualScrew.com, we know that downtime on a job site is just money leaking out of your pocket. That’s why we point our pro contractors toward the PMX line. These aren't just drill bits; they are precision-engineered "rebar eaters" designed for SDS-Max rotary hammers.
The 4-Cutter Advantage: The "X" in PMX
Most budget bits use a single carbide flake (a 2-cutter design). These are fine for brick, but the moment they hit rebar, they tend to bind, snap, or "walk" off-center.
The Relton PMX features a heavy-duty 4-cutter cross-head design. This creates several massive advantages:
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Rebar Resistance: The four cutters work in tandem to chew through rebar rather than getting hung up on it.
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Precision Holes: Because the bit has four points of contact, it stays perfectly centered, ensuring your anchors fit exactly as they should.
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Reduced Vibration: A smoother cutting action means less wear and tear on your rotary hammer—and your arms.
The PMX Heavy Hitters
Whether you are drilling deep for chemical anchors or setting large-diameter mechanical bolts, the PMX lineup has a specific tool for the task. Here are the most popular SDS-Max configurations we ship out:
| Model | Diameter | Length | Best Use Case |
| PMX-10-66 | 5/8" | 21" | Standard deep-hole anchoring in reinforced concrete. |
| PMX-12-66 | 3/4" | 21" | The "contractor’s choice" for mid-sized structural bolts. |
| PMX-14-66 | 7/8" | 21" | Ideal for heavy-duty utility and industrial installations. |
| PMX-20-54 | 1-1/4" | 15" | Large diameter holes where extra length isn't required. |
| PMX-20-66 | 1-1/4" | 21" | Maximum diameter and depth for massive structural anchors. |
Why Buy From Mutual Screw?
You could grab a generic bit from a big-box store, but when that bit melts 4 inches into a 20-inch hole, you’ll wish you had a Relton. We specialize in the high-performance gear that handles the jobs others walk away from.
When you shop at Mutual Screw & Supply, you’re getting more than just a product; you’re getting a partner that understands the specs. We keep the PMX-10-66 and its bigger brothers in stock and ready to ship, so you can stop fighting your equipment and start finishing your projects.
Ready to stop vibrating and start drilling? Explore our full selection of Relton SDS-Max Hammer Bits today and upgrade your productivity.