Fenn Trap MK4
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The Fenn® Mk4 Trap is a proven, spring-powered mechanical trap designed for effective control of rodents and small mustelids.
It is commonly selected by experienced pest managers looking for a non-toxin alternative to DOC 100 and DOC 150 style kill traps, particularly where a traditional spring trap is preferred.
Manufactured in the United Kingdom, the Fenn Mk4 has a long history of use in professional pest-control, rural, and conservation environments.
The trap delivers a powerful mechanical strike and is suitable for users who require a robust, reusable solution for targeted pest control.
Key Features
The Fenn Mk4 is a fully mechanical spring trap requiring no poisons or chemicals.
It is suitable for rats, mice, stoats, weasels, hedgehogs, and similar-sized pest species.
The trap is constructed from durable steel for long service life in outdoor conditions.
The Mk4 is compatible with Philproof® trap covers and tunnels, which guide animals into the correct strike position.
Best Practice Use
For best performance, the Fenn Mk4 should be used inside a secure trap cover or tunnel.
Covered setups help guide pests into a consistent, head-on approach similar to DOC-style tunnel traps such as the DOC 100 and DOC 150.
Using a cover improves strike consistency, protects the trap from weather and debris, and reduces interference.
Fenn traps have historically been deployed in New Zealand under Philproof® plastic trap covers as part of managed trapping systems.
Placement Tips
Install traps along natural travel routes including fence lines, bush edges, logs, and drains.
Secure the trap cover firmly to the ground to prevent movement.
Centre the trap inside the cover and ensure the treadle moves freely.
Product Specification
Trap type: Mechanical spring kill trap
Suitable for: Rats, mice, stoats, weasels, hedgehogs
Comparable traps: DOC 100, DOC 150 (alternative option)
Recommended setup: Inside a trap cover or tunnel
Material: Steel
Manufactured in: United Kingdom
Dimensions of trap cover:
125mm wide x 135mm high x 120mm long
Dimensions of trap set:
140mm wide x 50mm high x 120mm long
Weight: 380g
Stoat and weasel photos courtesy Neil Hayes.