Summary#
The KNIPEX Cobra XS is a 4-inch water pump pliers that delivers full-size Cobra performance in a pocket-friendly package. With 11 adjustment positions, one-hand quick-set operation, and capacity up to 1 inch, it's the go-to EDC pliers for technicians, hobbyists, and anyone who needs a capable grip tool that fits in a pocket or tool roll.
At a Glance#
Product : KNIPEX Cobra XS Water Pump Pliers (87 00 100)
Brand : KNIPEX
Best For : EDC enthusiasts and technicians who need compact pliers for tight spaces and everyday tasks
Form Factor : 4-inch mini water pump pliers, 3.2 oz
Buy Now : KNIPEX Cobra XS on Amazon
Key Highlights:
- Full Cobra functionality in a 4-inch pocket-sized body
- 11 fine adjustment positions for precise jaw sizing
- One-hand push-button jaw adjustment without repositioning
- Grips pipes, nuts, and bolts up to 1 inch (25mm) diameter
- Special hardened teeth maintain grip on round, hex, and flat surfaces
Who Should Buy This#
The KNIPEX Cobra XS fills a gap that most tool kits ignore: a real pliers small enough to carry everywhere. It delivers the same box-joint design and self-locking grip mechanism found in full-size Cobras, but at a fraction of the size and weight. Most competing mini pliers sacrifice jaw capacity or grip strength, but the Cobra XS holds firm on fittings up to 1 inch.
Perfect for:
- EDC enthusiasts who want a capable grip tool that fits alongside a pocket knife and flashlight
- HVAC and plumbing technicians who need to reach fittings in cramped spaces where 10-inch pliers won't fit
- Cyclists and mechanics who work on small fasteners, brake fittings, and cable adjustments in tight frames
- IT professionals and network techs who deal with cable glands, connector nuts, and rack hardware daily
Design & Build Quality#
The Cobra XS weighs just 3.2 ounces and measures 4 inches long, making it genuinely pocketable. The chrome vanadium electric steel construction feels solid despite the compact size. KNIPEX's signature red textured handles provide a secure grip even with oily hands, and the box-joint pivot eliminates the wobble you find in cheaper slip-joint pliers.
The slim jaw profile is the real design win here. It slides into spaces where standard pliers physically cannot reach. The jaws open to a surprising 1-inch capacity, which covers most small plumbing fittings, compression nuts, and hex fasteners you encounter in everyday work.
Key Features#
One-Hand Quick Adjustment#
The push-button adjustment mechanism lets you resize the jaw opening with one hand. Press the button, slide the jaw to the size you need, and it locks into one of 11 positions automatically. No fumbling with channel locks or repositioning. In tight spaces where your other hand is holding a pipe or flashlight, this is a genuine advantage over traditional pliers.
Self-Locking Grip on Round Objects#
The Cobra jaw geometry creates a self-locking effect on round surfaces. The harder you squeeze, the tighter the grip becomes. This means you can turn chrome-plated supply lines and polished fittings without slipping, even without serrated jaw inserts. The special hardened teeth bite into hex nuts and bolt heads without rounding corners.
Compact EDC Form Factor#
At 4 inches and 3.2 ounces, the Cobra XS fits in a jeans pocket, tool roll, or glove compartment without bulk. Compare that to the standard Cobra 250 at 10 inches and 10 ounces. You lose jaw capacity (1 inch vs 1.75 inches) but gain portability that makes you actually carry it.
Box-Joint Pivot Design#
Unlike slip-joint pliers that wobble under load, the box-joint keeps both jaw halves precisely aligned. This translates to more gripping force transferred to the workpiece and less hand fatigue. The pivot also stays smooth and tight over years of use because the joint surfaces are fully enclosed and protected from debris.
Technical Specifications#
Overall Length : 4 inches (100mm)
Weight : 3.2 oz (90g)
Jaw Capacity : Up to 1 inch (25mm)
Adjustment Positions : 11 fine settings
Jaw Type : Gripping surfaces with special hardened teeth
Joint Design : Box joint with push-button quick adjustment
Material : Chrome vanadium electric steel, oil-hardened
Handle : Non-slip textured plastic coating
Country of Origin : Germany
Model Number : 87 00 100
Pros & Cons#
Pros:
- Genuinely pocketable at 4 inches and 3.2 ounces
- Full Cobra self-locking jaw mechanism in miniature
- 11 adjustment positions for precise fitting
- One-hand push-button jaw sizing saves time in tight spots
- Box-joint pivot eliminates wobble and maximizes grip force
- German-made with KNIPEX's lifetime quality reputation
Cons:
- Maximum 1-inch jaw capacity limits use on larger fittings
- Short handles provide less leverage than full-size pliers
- Premium pricing compared to generic mini pliers
- No insulated version available for electrical work
Final Verdict#
Buy it. The KNIPEX Cobra XS is the rare compact tool that doesn't compromise on function, delivering real Cobra performance in a package small enough to carry every day.
Our recommendation: Pair it with your existing full-size pliers. The Cobra XS handles 80% of quick-grab tasks at a fraction of the size. Pick one up here: KNIPEX Cobra XS on Amazon