Square cutting inserts in a blue storage tray, with two inserts displayed in front.
Angled view of square cutting inserts in a blue storage tray.
Dimension diagram of a square cutting insert with a central mounting hole.
Front and back views of a square cutting insert with a central hole.
Front view of a square cutting insert with a central hole.
Back view of a square cutting insert with a recessed central hole.
Angled view of square cutting inserts in a blue storage tray.
Insert router bit with an enlarged underside view.
Angled view of an insert router bit with an enlarged underside detail.

SpeTool UK O01004 10 Pcs ATS Coated Solid Carbide 12 MM x 12 MM x 2.2 MM Carbide Insert Replacement for Insert Router Bit

SKU: UK-IPA-D12-10PCS-ATS
£35.80 GBP

Shipping calculated at checkout

Solid carbide replacement inserts feature four precision-ground cutting edges for extended tool life and consistent performance. Designed for surfacing router bits, they deliver smooth finishes, reduced downtime, and cost efficiency by allowing easy edge rotation instead of full bit replacement. Ideal for woodworking, CNC surfacing, and slab flattening.

Square Carbide Inserts – 12x12x2.2mm, 35° Angle, ATS Coating, 10-Pack

  • Premium Carbide: Solid tungsten carbide for sharp, durable cutting performance

  • Extended Tool Life: 4 indexable edges + ATS coating deliver up to 2.5X longer lifespan

  • Smooth Cutting: 35° cutting angle ensures clean, precise, tear-free results

  • Wide Compatibility: Compatible with SpeTool Surfacing Router Bits & Ranger Series Flush Trim Router Bits

  • Convenient Pack: Includes 10 inserts in a protective plastic container

 
Only 5 units left
Quantity:
Buy Any 3 Router Bits, Get 1 Pack of Sanding Discs FREESimply add 3 router bits and 1 pack of sanding discs to your cart. While Supplies Last.
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Local delivery
Free shipping
90-day Refund
365-Day Warranty

Stay sharp longer – the smart choice for CNC surfacing.

Fingers holding a square cutting insert against a router bit.

Four edges, four times the life – keep cutting like new!
SpeTool ATS Coated Carbide 4 Cutting Edges Insert Replacement for Planer Bit

Beat the heat – ATS coating for extreme durability.
SpeTool Customized Insert

Precision edges for flawless finishes, every pass.

Similar Size

Part No.

Length
（L）

Width
(W)

Height
(H)

Degree
(a°)

 Coating Compatible with
O01001 12mm 12mm 2.2mm 35° W05010
O01002 10mm 10mm 2.2mm 30° W05001/W05004
O01003 10.5mm 10.5mm 2.2mm 35° W05005
O01004 12mm 12mm 2.2mm 35° ATS *W05002-ATS/*W05003-ATS
O01008 10mm 10mm 2.2mm 30° ATS *W05004-ATS

*Customized sizes are acceptable

Frequently Asked Questions

Some are proprietary, while others may fit if dimensions match:

Measure carefully, particularly tip shape and taper—size alone isn’t enough.

Yes—carbide insert tools offer an easy starting point for turning with minimal learning curve.

Generally, yes—since most act like scrapers, they often require additional sanding.

Depends—flatter inserts might need more sanding, whereas some users blend carbide with traditional tools for finish.

Use proper torque—over-tightening can crack inserts, especially on planers.

Yes—saving original screws is advised, as replacements may not always fit perfectly.