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    In Progress
    Product Requirements Definition (PRD)Industrial DesignMechanical EngineeringPrototyping & Proof of ConceptDesign for Manufacturing (DFM)Sourcing & Vendor Management
    Client: Nir Cohen
    Dual-Stage Dog Leash

    Dual-Stage Dog Leash

    One Leash That Grows With Your Dog

    Product Overview

    Dogs change quickly during their first months and years. A leash that works perfectly for a small puppy often becomes less suitable once the dog grows stronger and heavier. The Dual-Stage Dog Leash System is designed to solve this problem with a smart modular approach that adapts to both stages of your dog's development.

    In Stage 1, the leash uses a retractable cassette module that connects directly to the ergonomic handle, allowing extension to 5–8 meters — ideal for puppies and small dogs exploring parks and open areas. The retractable system automatically manages slack, preventing tangles while giving the dog freedom to sniff and move naturally.

    In Stage 2, the retractable cassette detaches and is replaced with a non-retractable fixed leash designed for stronger, medium and large dogs. This configuration provides higher strength, durability, and precise control for daily urban walking, crowded environments, and training situations.

    At the heart of the system is a universal ergonomic handle that supports both leash modes. By simply switching modules, owners can adapt the leash to the dog's size, strength, and walking environment - reducing the need to purchase multiple leashes over time.

    ATI Scope of Work

    Product Requirements Definition (PRD)
    Industrial Design
    Mechanical Engineering
    Prototyping & Proof of Concept
    Design for Manufacturing (DFM)
    Sourcing & Vendor Management

    Product Gallery

    Dual-Stage Dog Leash image 1
    Dual-Stage Dog Leash image 2
    Dual-Stage Dog Leash image 3
    Dual-Stage Dog Leash image 4
    Dual-Stage Dog Leash image 5

    Key Features

    Two-Stage System

    Switchable retractable and fixed leash modules using the same ergonomic handle.

    Grows With Your Dog

    From playful puppy exploration to confident adult dog walking — one product for both stages.

    Ergonomic Handle

    Universal comfort grip designed for long walks with secure module attachment.

    Strength & Durability

    Fixed leash mode engineered for medium and large dogs with heavy pulling force.

    Modular Design

    Replaceable retractable cassette module for easy transition between stages.

    Retractable Freedom

    5–8 meter extension range with automatic slack management and reliable locking mechanism.

    Specifications

    Product TypeModular dual-stage dog leash system
    ClientNir Cohen
    Stage 1 Range5–8 meters (retractable)
    Stage 2 TypeFixed-length, high-strength
    ATI ScopeIndustrial design, mechanical engineering, DFM
    StatusIn development
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