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Throw Weight Basic

SKU: 0644R
Weight: 0.75 lb
Original price $0.00 - Original price $0.00
Original price $0.00
$15.71 - $15.71
Current price $15.71
Color: Red
Weight: 12 oz.

These are throw bags (aka "throwballs"). If you are an experienced arborist OR recreational tree climber you know all about these things...

If you are not, and want to know what these are and what they do you have come to the right place.

Throw bags are pretty simple, they are designed specifically to attach throwline to and then tossed up into a tree and over a limb. Once you do that you can attach your main rope (climbing rope or rigging line) to the tail end of the throw line and pull it up to the tree.

So when you see arborist climbing around in a tree, and you wonder how they get the rope up there...this is what they use.

We stock two different kinds of throw weights.


  • More aerodynamic.
  • Have attachment at bottom for extra caribiner.
  • Generally seen as the premium throwbag.
Standard" Throw Weight
  • Good quality.
  • Gets the job done.

As the owner of Knot & Rope Supply, If you want my opinion, get yourself one Bullet Throw weight and one regular one. Put one on each end of your throwline. Use the Bullet weight to throw, and the other weight on the end to keep it from leaving the ground as the other weight sails through the tree.

I personally throw a 12 oz weight and keep a 16 oz. on the other end. This way when you need to manipulate the line through the tree, the heavy weight on the other end helps pull through anything.


Knots & Splices

Wherever possible, use splices constructed to safe specifications. A proper splice on a rope can maintain 80% to 100% of the new rope average break strength. Trained personnel should construct all splices. If knots are used on a rope, be aware that they can reduce the rope's strength by up to 50%. If knots are required, be sure to select the proper knot for the job.

Rope Strengths

All rope has a rating referred to as a "tensile strength" or "average break strength." This number is the amount of weight that the rope should be able to hold in ideal conditions, specifically, a new rope, with no knots or splices, at room temperature. These break strength numbers are based on actual destructive break testing by the manufacturer or a certified third-party testing facility. Ropes are tested over many cycles and the average break strength is determined and specified for the product. We test our ropes personally, and all our splicers have their work tested on an ongoing basis using a certified test bed facility. This is to ensure that their splicing work is perfect, and that their splicing technique and skills are 100% within acceptable splicing guidelines set by the rope industry. Even the best splices and best rope can break if overloaded or used improperly. Make sure you thoroughly understand what you are doing with a rope. Get the right rope for the right job. If you have questions or are even remotely unsure or have doubts. STOP and get the information you need to BE SURE you are doing things safely.

ope wear, knots, extreme hot or cold temperatures, chemicals, the manner in which the load is applied and other factors will result in a break strength lower than the stated average break strength.

A rope with a stated or advertised break strength, in pounds will not necessarily safely hold something that weighs that amount! Refer to the SAFE WORKING LOAD of a specific rope for more information.

IF IN DOUBT, ASK A PROFESSIONAL. We get calls all the time from people who have questions about what is the best rope to use for any given application. Don't be afraid to ask. Ultimately YOU are responsible for your safety using ANY rope, so don't chance it.

Working Loads

In a broad generalization, most working loads vary from 1/10 to 1/4 of the average break strength of the rope. Applications for rope used in life support or personal fall protection environments must use the 1/10 ratio.