Chamfer Replacement Knife for Insert-Pro Door Making Rail and Stile Set

Chamfer Replacement Knife for Insert-Pro Door Making Rail and Stile Set - View 3

$24.34 ~~$39.9~~ In stock

Replacement Knives For Interior / Exterior Door Heads

Designed to fit on Infinity Tools Insert-Pro Interior / Exterior Door Making 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.

Please note: Two (2) replaceable Insert-Pro knives are required per each head (top & bottom), so a total of four (4) are required per set-up. Each knife is sold individually.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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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)

William ★★★★★ Oct 22, 2026

Just finished a set of exterior door heads and these replacement knives cut cleanly with zero chatter. The sub-micron carbide holds an edge noticeably longer than the stock set I was using before.

Miles ★★★★★ Oct 21, 2026

The C4 sub-micron carbide is noticeably sharper than whatever was in there before—the cuts on my door heads came out clean without any chatter. Fit the Insert-Pro heads perfectly, zero slop or fiddling.

Michael C. ★★★★★ Oct 20, 2026

Finally got around to swapping out the old knives on my door set, and the C4 sub-micron carbide is holding an edge noticeably longer than what I had before. The fit on the Insert-Pro head was spot on, no fiddling with shims.