6 Best Arborist Throws For Setting High Lines In Trees

A perfectly placed throw line is the gateway to safe, efficient access to the canopy, turning a daunting limb into a reliable anchor point. Selecting the right weight determines whether the line clears the crotch on the first attempt or becomes a source of endless frustration. Choosing gear that matches your specific climbing style ensures that every ascent starts with a clean, controlled rope installation.

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Weaver Arborist Throw Weight: Best Overall

The Weaver Arborist Throw Weight stands as the industry benchmark for consistent performance and reliable flight characteristics. Its aerodynamic shape and balanced internal fill allow for precise placement in a wide variety of tree species and branch structures. This weight excels because it handles the transition from open forest settings to more complex canopy work with equal ease.

Durability is a primary strength here, as the Cordura construction resists abrasion against rough bark and repeated ground impacts. The attachment point is reinforced to handle the tension of snagged lines without compromising the integrity of the bag. For the arborist who needs one reliable tool that performs in every scenario, this is the definitive choice.

Notch Throw Weight: Top Choice For Accuracy

When precision is the only metric that matters, the Notch Throw Weight delivers with exceptional stability in flight. Its streamlined profile reduces wind drag significantly, which is critical when attempting to hit a specific union high in the canopy. The internal shot distribution ensures the bag stays true to its trajectory even when tossed from awkward angles.

This weight is designed for the technician who spends time analyzing the target before the throw. Because it cuts through the air with minimal wobbling, it minimizes the risk of the line getting caught on unnecessary twigs during the ascent. If your work involves frequent high-canopy maneuvers where a single missed throw costs valuable time, invest in the accuracy Notch provides.

Petzl Jet Throw Bag: Most Durable Option

The Petzl Jet is engineered for those who demand gear that survives the harshest environments without losing its shape. The heavy-duty PVC coating provides a slick surface that slides over limbs with minimal friction, reducing the likelihood of the bag getting stuck in tight unions. It is built to withstand repeated drops onto rocky ground or hard-packed soil, ensuring a long lifespan in any kit.

Beyond its toughness, the Petzl Jet features a streamlined, ergonomic shape that minimizes catching on protruding branch stubs. It is a workhorse that justifies its cost through sheer resilience and consistent material quality. Choose this option if the terrain is unforgiving or if you require a bag that consistently resists the wear and tear of daily professional use.

Buckingham Throw Weight: Best Budget Pick

The Buckingham Throw Weight provides a straightforward, functional solution for those building their gear kit without unnecessary frills. It utilizes a durable, high-visibility fabric that holds up well against common trail hazards while keeping the weight affordable. While it may lack some of the advanced aerodynamic design of premium competitors, it is perfectly capable of clearing standard anchor points.

This is an excellent starting point for those new to canopy access or for someone looking to round out a secondary kit. It handles general-purpose tasks reliably, proving that high-performance results do not always require high-dollar investments. If you need a solid, no-nonsense weight that gets the job done at an entry-level price, the Buckingham is the clear winner.

Harrison Rocket Throw Bag: Easiest To See

Visual tracking is essential when working in thick, leafy canopies, and the Harrison Rocket is purpose-built to remain visible. The bright, high-contrast colors are designed to stand out against foliage, allowing for easier retrieval and identification during the setup process. This reduces the time spent scanning for a lost bag in dense undergrowth or high branches.

The shape is specifically tuned for performance, often described as a hybrid between classic bags and specialized projectiles. This helps it maintain velocity through thick leaves, preventing the common issue of the bag getting “lost” in a canopy layer. For anyone who struggles with tracking their gear in deep forest environments, the Harrison Rocket is a significant upgrade in efficiency.

Edelrid Throw Bag: Best For Dense Canopies

The Edelrid Throw Bag is designed with a specialized profile that excels at threading the needle through dense, congested branch unions. Its weight distribution is highly concentrated, providing the momentum needed to force a line through areas where branches are clustered tightly together. This makes it a preferred tool for navigating complex tree structures where other bags might get hung up.

The materials are selected for both impact resistance and low-friction movement against wood surfaces. By focusing on a compact design, it maximizes the probability of clearing a difficult crotch without excessive effort. If your regular route takes you into old-growth trees or heavily wooded areas with complex branching, this bag provides the necessary leverage to succeed.

Choosing The Perfect Weight For Your Throw

Selecting the right weight is a balancing act between the height of the branch and the diameter of the line. Standard weights typically range from 8 to 16 ounces, with 10 to 12 ounces serving as the “sweet spot” for most general-purpose applications. A weight that is too light will struggle to pull the line down, while one that is too heavy becomes physically taxing and increases the risk of damage upon impact.

• 8-10 oz: Best for thin lines and low-to-mid height installations where minimal force is required.
• 12 oz: The most versatile option for standard climbing lines and a broad range of tree types.
• 14-16 oz: Ideal for heavy-duty applications or when using thicker, high-friction rigging lines.

Always consider the wind conditions and the density of the tree. A slightly heavier bag can help punch through gusty conditions or dense foliage, but it requires a more deliberate and steady throwing technique to maintain accuracy.

Proper Throwing Techniques For High Branches

Successful line placement relies on a smooth, rhythmic motion rather than raw power. Stand with your feet shoulder-width apart and keep your eyes fixed on the target union throughout the entire arc of the throw. A pendulum-style motion, where the bag is swung back and forth before the final release, helps generate consistent momentum and improves trajectory control.

Avoid “short-arming” the throw, as this leads to erratic flight paths and decreased distance. Instead, follow through with your entire body, allowing the weight to reach its peak velocity before releasing the line from the throwing cube or your hand. Practice these movements on the ground first to develop the necessary muscle memory for height-critical shots.

Maintaining Your Throw Line To Prevent Snags

A clean throw line is the secret to a smooth setup; a tangled or kinked line is a recipe for a stuck bag. Always store your line in a specialized throw-line cube or a dedicated bag to prevent knotting during transport. Regularly inspect the line for fraying, especially near the attachment point, as damage here can cause the line to fail or fray excessively on limb contact.

If the line becomes covered in sap or dirt, gently wash it with mild soap and water to keep it gliding smoothly. Periodically check the weight’s attachment point for wear; a fraying loop is the most common cause of a lost throw bag high in a tree. Keeping the line dry and free of debris ensures it moves through the crotch with the least amount of friction possible.

Pairing Your Throw Weight With The Right Line

The performance of your throw weight is inextricably linked to the diameter and slickness of your line. A thin, low-stretch line like Dyneema offers minimal friction but can be difficult to handle, while thicker lines are easier on the hands but create more drag over bark. Aim for a line that balances durability with a low-friction coating to ensure the weight pulls it through effortlessly.

When switching between weights, ensure the knot connecting the line to the bag is as streamlined as possible to prevent it from catching on branches. A simple, tight knot—or using a dedicated swivel attachment—prevents the setup from spinning during the climb. Matching a high-visibility, lightweight throw line to your chosen bag will make every installation feel effortless, regardless of the tree’s height.

Effective tree climbing is built on the foundation of a clean, successful line installation. By choosing a high-quality throw weight and maintaining your gear with care, you eliminate the biggest obstacles to a productive and safe climb. Head out, set your line with confidence, and enjoy the unique perspective that only the canopy can offer.