Serrated edges outperform plain edges on specific cutting tasks: rope, paracord, webbing, seatbelts, strapping, zip ties, fibrous vegetables, and any material that compresses under a plain-edge push cut rather than yielding to it cleanly. The serrations initiate multiple contact points along the edge simultaneously, allowing the blade to bite into and tear through fibrous material without the material skating away from the tip. For buyers who do a lot of cutting in those categories — utility work, boating, emergency preparedness, outdoor carry — a serrated edge is a more capable tool than a plain edge for those specific tasks. The trade-off is that serrated edges require a round or cone-shaped sharpening tool to maintain and are less suited to fine slicing and detail work where a plain edge excels.

CPM MagnaCut's edge retention properties are particularly valuable in a serrated grind. Most serrated production knives use 8Cr13MoV or similar stainless alloys where the steel's relatively low edge retention means the serrations dull progressively with extended use on tough fibrous materials. CPM MagnaCut holds its edge significantly longer across the board — and in serrated geometry, that directly translates to serrations that stay aggressive and effective through sustained cutting on rope, webbing, and strapping without the early-onset dulling common in lower-tier serrated knives. Running the best steel in the Bel Air series in the serrated variant is the right call for buyers who need their serrated edge to actually perform over time.

The 6105BLKST shares the same core platform as all Bel Air 6105 variants: CPM MagnaCut blade, reverse tanto geometry, SpeedSafe assisted opening, Liner Lock, black anodized aluminum handle, and USA manufacture in Tualatin, Oregon. The sole differentiator is the edge grind — serrated rather than plain. The plain-edge variants (6105OLSW, 6105GRYBW, 6105NBBW, 6105RDBW, 6105CF, 6105WBLU, 6105WGLD) are the more versatile everyday carry option for general cutting tasks. The 6105BLKST is the dedicated tool for buyers who prioritize performance on fibrous and tough materials. Many buyers carry both — a plain-edge Bel Air as their primary EDC and the 6105BLKST as a task-specific backup.

Serrated edges require a different sharpening approach than plain edges. Each serration is individually sharpened using a tapered round or cone-shaped sharpening rod — ceramic rods, diamond-coated tapered rods, or serration-specific sharpening tools work well. The rod is placed into each serration at the bevel angle and worked with light strokes until a burr forms on the flat side of the blade, then the flat is lightly stropped to remove the burr. CPM MagnaCut's edge retention means the 6105BLKST will need sharpening less frequently than serrated knives in lower-tier steels, but when it does need attention, the same technique applies. The Lansky Tactical Sharpening System and Spyderco Sharpmaker are commonly used tools that include tapered rods sized for serration maintenance.

The Bel Air 6105BLKST is a SpeedSafe assisted-opening folding knife — not an automatic or OTF. It requires manual thumb stud pressure to initiate opening, which places it outside the federal definition of a switchblade. Serrated blades are not subject to separate federal restrictions beyond standard blade length and carry laws. State, city, and municipality laws vary. Knifeworks cannot provide legal advice. Check your local laws at akti.org (American Knife and Tool Institute) before carrying, or call us at 888-225-9775.

Kershaw offers a lifetime warranty against defects in materials and workmanship. If the knife fails due to a manufacturing defect, Kershaw will repair or replace it at no charge. Warranty service is handled directly by Kershaw — not Knifeworks. Submit a claim through Kershaw's website at kershawknives.com with a description of the issue and proof of purchase. Normal wear, sharpening wear on the serrations, and damage from misuse are not covered.

A reverse tanto features a spine that curves downward to meet the edge, creating a reinforced, mass-forward tip. On the 6105BLKST, the reverse tanto geometry complements the serrated edge by dividing the blade into two functional zones: the reinforced tip handles puncture and controlled entry cuts where a strong, precise point matters, while the serrated portion of the edge handles aggressive draw cuts on fibrous material where serrations excel. The combination gives the 6105BLKST a functional range that a plain tanto or plain spear point serrated blade does not achieve as cleanly.

Yes. The Bel Air 6105BLKST is manufactured at Kershaw's production facility in Tualatin, Oregon. USA-made Kershaw knives go through domestic quality control and are held to tighter fit-and-finish standards than Kershaw's offshore production line. All variants in the 6105 Bel Air series are USA production pieces.