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Product Information
The Seac K-Jack Knife is a compact diver's knife built for scuba divers and freedivers who need a reliable tool for cutting fishing line, pointing out marine life, or signaling a buddy by tapping the tank. It features a stainless steel double-edge blade with a smooth side, a serrated side, and a built-in line cutter notch, and it measures 5.9 inches.
Who it is for
This knife suits scuba divers and free divers who want a small, well-balanced cutting tool they can mount directly to their BCD jacket. Its blunt tip is designed to prevent accidental damage to the jacket bag, and the same blunt profile lets the knife double as a screwdriver for minor gear adjustments underwater or topside.
Key details
- Stainless steel blade with a double edge: one smooth side and one serrated side, plus a dedicated line cutter notch
- Blunt tip design protects the BCD jacket from accidental punctures and allows screwdriver-style use
- Overall size: 5.9 inches
- Shockproof plastic sheath with an asymmetric Easy Lock closure.
Compatibility and sizing
The K-Jack comes with a universal attachment kit designed for mounting to a BCD jacket. It is available in a single 5.9 inch size.
What's in the box
- K-Jack knife
- Shockproof plastic sheath
- Universal attachment kit
DiveCatalog.com is an authorized Seac dealer and a dive shop in Irvine, California, operating since 2003. Call or chat with us if you have questions about fit, mounting, or compatibility with your BCD before you order.
- Stainless steel blade with a built-in line cutter notch for quickly freeing tangled fishing line.
- Double-edge design combines a smooth side and a serrated side on the same blade.
- Blunt tip prevents accidental damage to the BCD jacket bag during use or storage.
- Screwdriver function is possible thanks to the blunt tip profile, useful for minor gear adjustments.
- Universal attachment kit included for mounting the knife to a BCD jacket.
- Shockproof plastic sheath protects the blade and resists impact.
- Easy Lock closure is an asymmetric closure on the shockproof plastic sheath.
- Compact size of 5.9 inches, with a universal kit for mounting to a BCD jacket.
| Brand | Seac |
| Model | K-Jack |
| Product type | Diver's knife |
| Overall size | 5.9 in |
| Blade material | Stainless steel |
| Blade style | Double edge: smooth and serrated, plus line cutter notch |
| Tip style | Blunt tip, doubles as screwdriver |
| Sheath material | Shockproof plastic |
| Sheath closure | Easy Lock asymmetric closure |
| Attachment | Universal attachment kit for BCD jacket mounting |
| MPN | 0550019000000A |
| Barcode | 887728106074 |
- K-Jack knife
- Shockproof plastic sheath
- Universal attachment kit
⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
Can the Seac K-Jack knife be used as a screwdriver?
Yes. The K-Jack's blunt tip is designed so the knife can double as a screwdriver for minor gear adjustments, in addition to preventing accidental damage to the BCD jacket bag when the knife is sheathed or stowed.
How is the Seac K-Jack knife attached to a BCD?
The K-Jack ships with a universal attachment kit for mounting to a BCD jacket, and the shockproof sheath uses an asymmetric Easy Lock closure.
What size is the Seac K-Jack knife?
The Seac K-Jack is offered in a single 5.9 in size, a compact design intended for mounting on a BCD jacket.
What does the Seac K-Jack knife blade look like?
The blade is stainless steel with a double edge, one smooth side and one serrated side, plus a dedicated line cutter notch for quickly cutting fishing line or tangled cord without needing a separate tool.
