This Compostella Square XL S is a direct-from-maker custom lockback handmade in Italy by Stefano Compostella. Completed in June 2026, it pairs a 4.5-inch Erasteel APZ10 blade heat-treated to 60 HRC with a Damasteel Ladder handle, also hardened to 60 HRC and finished with a dark Diamond Like Carbon coating.
The blade immediately defines the knife. Its complex compound geometry combines precisely hand-finished satin planes with broad mirror-polished facets that reflect the surroundings like glass. Meanwhile, the long, angular profile gives this substantial folder a refined but unmistakably assertive presence.
Stefano created the Square XL S within the tradition represented by Compostella 1895 Custom Knives. His family’s involvement with knives dates to 1895, while his individual work reflects a modern interpretation of handmade Italian cutlery. Collectors drawn to this combination of heritage and contemporary execution can also Shop by Maker for other amazing craftsmen offered through We Buy Knife Collections.
Compostella Square XL S: Handmade Italian Lockback
The Square XL S measures 10.125 inches overall and 5.625 inches closed, placing it firmly in the full-size custom-folder category. Despite its substantial dimensions and 4.5-inch blade, the knife weighs approximately 6.5 ounces.
Stefano Compostella builds his knives by hand with traditional workshop equipment, including a belt grinder, disc grinder, buffer, and drill press. Instead of relying on a standardized factory configuration, he develops each knife through its materials, geometry, finish, and intended presentation.
That approach is visible throughout this Square XL S. The crisp handle lines echo the angular grind transitions on the blade. Polished black surfaces frame the patterned Damasteel, while bright stainless hardware creates measured points of contrast.
4.5-Inch APZ10 Compound Blade
The 4.5-inch blade uses Erasteel APZ10 heat-treated to 60 HRC. Its broad central satin plane is bordered by multiple mirror-polished surfaces, including the dramatic forward bevel and long upper facet.
Each grind plane serves a visual purpose. The fine hand-applied satin lines emphasize the length of the blade, while the polished sections sharpen its silhouette and reveal the complexity of the compound grind. As the knife moves under the light, those contrasting finishes change the appearance of the blade from every angle.
A narrow, reinforced point forms where the forward grind planes converge. The edge remains visually clean and uninterrupted, while the long upper geometry adds structure without making the blade appear heavy.
The blade opens manually through dual cylindrical thumb studs. Their restrained design suits the knife’s architectural appearance and keeps attention on the hand-ground blade.
Collectors comparing high-end Custom Folding Knives will find that the Square XL S achieves its impact through proportion and finish rather than unnecessary ornamentation.
DLC Damasteel Ladder Handle at 60 HRC
The handle is constructed from Damasteel Ladder heat-treated to 60 HRC. A Diamond Like Carbon coating darkens the material and creates a rich black-and-gray presentation across the full-length patterned sections.
The Ladder pattern runs longitudinally along the handle. Repeating oval formations and fine parallel lines reinforce the knife’s length, while the etched Damasteel remains visible beneath the DLC treatment.
Highly polished black borders frame the patterned steel. These reflective surfaces create a strong connection to the mirror-polished blade facets and give the knife a consistent visual language from the point to the end of the handle.
A distinctive circular pivot assembly contains multiple polished recesses. Its mechanical appearance works especially well against the flowing Ladder pattern, providing a precise focal point near the front of the handle.
Square XL S Lockback Construction
This full-size folder uses a traditional lockback mechanism adapted to Stefano Compostella’s modern design. The knife’s Certificate of Authenticity identifies Buderus Nitro-B for the locking lever and spring.
The lockback bar runs along the spine of the handle and follows the angular exterior profile. Its position allows the show-side and reverse-side Damasteel sections to remain visually uninterrupted.
Stainless steel is used for the pivot and screws. Bright hardware contrasts with the DLC-treated handle and also ties the construction back to the satin and mirror-polished sections of the blade.
Viewed from the spine, the knife reveals substantial blade stock, fitted handle components, and the long lockback assembly. The blade sits within the handle when closed, transforming the dramatic open profile into a compact, geometric presentation.
Direct-From-Maker Provenance
This Compostella Square XL S comes directly from Stefano Compostella and was completed in June 2026. Its signed maker’s Certificate of Authenticity confirms the model, blade steel, hardness, handle material, coating, lock components, hardware, sheath maker, date, and maker attribution.
The complete presentation includes:
- Signed Compostella 1895 Certificate of Authenticity
- Protective carbon-fiber-patterned zippered case
- Custom black Italian leather sheath
- Integrated metal clip on the leather sheath
The COA identifies F. Nova as the maker of the sheath. The black leather construction complements the DLC-finished knife and provides a dedicated carry option without attaching a conventional pocket clip directly to the handle.
Original documentation and direct maker provenance are particularly important for individually built collector knives. Owners with similarly significant pieces can learn more about how to Sell Your Knife Collection directly to We Buy Knife Collections.
WBKC Collector Perspective
The Square XL S demonstrates how a limited material palette can produce a highly sophisticated custom knife. Black DLC, patterned Damasteel, stainless hardware, satin steel, and mirror-polished facets create the entire presentation.
The supplied photography documents the clean hand-rubbed satin planes, reflective compound-grind facets, intact Ladder pattern, polished handle borders, lockback spine, stainless fasteners, signed COA, original case, and fitted leather sheath.
Its proportions also distinguish it from smaller gentleman’s folders. At more than ten inches open, this is a substantial custom lockback with the visual presence of a centerpiece. However, the narrow handle, controlled geometry, and integrated material treatment keep the design balanced rather than oversized.
Video Introduction: Compestella XL S
This is the Stefano Compostella Square XL S, a direct-from-maker Italian lockback completed in June 2026. It features a 4.5-inch Erasteel APZ10 compound-ground blade at 60 HRC, DLC-coated Damasteel Ladder construction, and a custom leather sheath by F. Nova.
Compostella Square XL S Frequently Asked Questions
What steel is used for the blade?
The blade is made from Erasteel APZ10 and heat-treated to 60 HRC, as documented on the signed maker’s certificate.
What finish is applied to the blade?
The blade combines hand-applied satin planes with partially mirror-polished compound-grind facets.
Is the handle made from Damasteel?
Yes. The handle uses Damasteel Ladder heat-treated to 60 HRC and finished with a Diamond Like Carbon coating.
What type of lock does the Square XL S use?
This knife uses a lockback mechanism. The maker’s COA identifies the locking lever and spring material as Buderus Nitro-B.
How does the blade open?
The blade opens manually through dual thumb studs positioned near the pivot.
Does the knife have a pocket clip?
The knife itself does not use a conventional pocket clip. Instead, the included custom Italian leather sheath has an integrated metal clip.
Who made the leather sheath?
The signed certificate identifies F. Nova as the sheath maker.
When was this knife completed?
The Square XL S was completed in June 2026.
Is this knife direct from the maker?
Yes. This example was acquired directly from Stefano Compostella and includes its signed COA, zippered case, and leather sheath.
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