Chamfer Replacement Knife for Insert-Pro Extended Tenon Head

Chamfer Replacement Knife for Insert-Pro Extended Tenon Head - View 3

$26.73 ~~$39.9~~ In stock

Designed to fit on Infinity Tools Insert-Pro Extended Tenon shaper heads, these knives are made from a C4 sub-micron grade of carbide that will last longer and outperform any brazed carbide cutters on the market. You will love the razor-sharp edges and precision-ground mirror finish. The quality of cut they produce is superb and sharpening is very simple. We offer five (5) popular door making profiles to give your Door Making System maximum versatility. These profiles allow you to cut mating cope ends when using our Interior / Exterior Door Making System.

Please note: Two (2) replaceable Insert-Pro knives are required per head, each sold individually.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Brian T. ★★★★★ Oct 22, 2026

Cut three hundred linear feet of white oak before I even thought about swapping these out. The C4 carbide held an edge noticeably longer than the brazed cutters I used before, and the fit on the tenon head was dead-on from the first pass. No chatter, no burn marks, just clean shoulders every time.

Thomas U. ★★★★★ Oct 21, 2026

The C4 sub-micron carbide is the real deal—I’ve pushed these through some gnarly grain and they’re still razor sharp when my old brazed blades would’ve been dull. They seat into the tenon head perfectly, no wobble.

Benjamin ★★★★★ Oct 20, 2026

I’ve been running these knives on my shaper head for a few weeks now, and they’re holding an edge far longer than any brazed carbide cutters I’ve tried. The fit into the tenon head was precise with no wobble at all. Clean cuts on every pass.