Infinity Tools 1/2" Shank Car Audio Flush Trim Router Bit

It gives a 1/32" offset — oversized or undersized — so you can follow a template and produce pieces that are either 1/32" larger or 1/32" smaller than the original. This is ideal for speaker boxes. Explore more flush-trim router bits.

Speaker boxes often need extra space so that vinyl coverings and other components fit together. The 1/32" offset lets you make a part slightly larger or smaller than the template to create that clearance.

It has a 1/2" shank and requires a router that accepts a 1/2" collet. Browse all our carbide router bits.

They use C4 micro-grain carbide tips, which provide long life and can be sharpened repeatedly.

The silver PTFE coating reduces resin build-up, so the bit stays cleaner and is faster and easier to clean between jobs.

Yes. Their aggressive shear-angled geometry produces clean cuts without fraying or torn edges, leaving a perfectly finished surface.

The bits have cutter diameters of 13/32" and 17/32", cutter heights of 1" and 1-1/32", a 1/2" bearing diameter, and overall lengths of 3-1/32" and 3-1/8".

The high-quality construction lets you make small rabbets and steps in a wide range of materials, and for longer periods between sharpenings than conventional router bits.

These are template-following bits, so you guide them against a pattern. Pair them with router templates to produce consistent speaker-box parts.

Yes. The C4 micro-grain carbide tips are made for long life and repeated sharpening, so the bits stay productive over time.