Don Carlos Quarter Moon Knife

 Frieder Herder Pikas Knife

The don carlos knife, also known as the Don Carlos Quarter Moon Knife (model 4529-10,00), is a professional-grade tool trusted for over a century.

It is widely used by uPVC window manufacturers, fitters, leatherworkers, flooring installers, and saddlers.

Its curved carbon steel blade delivers precise, clean cuts.

This genuine don carlos tool is a proven uPVC sprue knife for removing excess weld sprue from uPVC windows and door frames.

It performs especially well in cleaning corners welds, cills welds, and other areas where a sprue knife offers greater precision than a corner cleaner.

The rigid, polished blade also suits scraping sealants, trimming vinyl flooring or leather, skiving, and detailed cutting work.

Key Features & Benefits of the Don Carlos Knife

• High-quality carbon steel blade — sharp, durable, and resharpenable
• Quarter moon (crescent) curved shape — perfect for controlled slicing and scraping
• Comfortable wooden handle — ergonomic design reduces hand fatigue during extended use
• Strong & sturdy construction — built for heavy-duty professional applications
• Made in Germany by Friedr. Herder Abr. Sohn (Solingen) — renowned for precision tools
• Multi-purpose — excellent for uPVC window fabrication and instalation, leatherwork, vinyl, linoleum cutting, upholstery, and saddlery.

The don carlos quarter moon knife is also known as a don carlos moon knife in many trades.

For window fabrication, it works as a uPVC sprue knife, a window sprue knife, and a practical uPVC window sprue removal tool.

The don carlos knife remains a dependable choice for controlled scraping and finishing.

• Blade Material: Carbon Steel (polished)
• Blade Length: 95 mm (approx. 3.75")
• Overall Length: 210 mm
• Handle: Natural varnished wood with brass fittings
• Weight: Approx. 100 g
• Origin: Made in Germany
• Brand: Don Carlos (Friedr. Herder PIKAS)

• Removing weld sprue from uPVC window frames
• Cleaning excess plastic from welded joints
• Carpet/flooring installers (cutting vinyl and linoleum)
• Leatherworkers and saddlers (trimming and skiving)
• General scraping and detailed cutting tasks

Note: This is the classic carbon steel version (not stainless).

Keep the blade dry and lightly oiled after use to prevent rust.

It can be resharpened multiple times for lifelong performance.

Genuine Don Carlos – identified by the spade logo on the blade.

A staple tool in professional toolkits across the glazing, flooring, and leather trades.