DMM
DMM Hitch Climber Kit
A matched hitch-tending pulley and connector set for building a friction hitch system.
Eye & Eye Prusiks
Representative photo. Check the retailer listing for the exact model, color and size.
Photo: Hot day in technical rescue training by Grand Canyon NPS, CC BY 2.0
A small tending aid for climbers who want a friction hitch that releases cleanly.
Big Jim's Hitch Breaker is a compact tending aid that sits at the base of your friction hitch and gives you a solid point to break and release it. Climbers use the hitch breaker to make descents smoother and to keep the climbing hitch dressed and tended as they advance up the line.
Every friction hitch climber knows the moment: you have been sitting in the saddle, the hitch has bitten down hard, and now you need to move. Grabbing the top of a Distel or VT and pulling it down works, but it is fiddly with gloves on and it can lurch. A hitch breaker gives you a dedicated, rigid point at the base of the hitch to pull against, so the release is more gradual and controlled.
It also helps the hitch keep its shape. When a climbing hitch is tended from below, it stays dressed and is less likely to roll or creep out of position as you advance. That means less time re-dressing cord and more time working.
The breaker is not a replacement for a properly tied, properly sized hitch. Cord diameter, cord material, the number of wraps and the rope you are climbing on still decide how well the system grabs and releases.
Because it gives your hand a consistent place to work, the release becomes more repeatable, which is what helps most on long descents where you are feathering the hitch for minutes at a time.
Follow the instructions that come with the device for how it connects to your hitch cord and bridge, and match your cord and rope diameters to what the maker recommends. Build the system on the ground, load-test it at chest height, and check that the hitch grabs fully when you let go before you leave the ground.
If you are switching from a hitch-tending pulley, expect a short learning period. The release feels different, and you may want to adjust the number of wraps or the cord length to get the feel right.
Anything you hang your life on must meet the applicable standard, be used per the manufacturer's instructions and ANSI Z133, and be inspected before every climb by a trained user.
Expect to fine-tune the system over a few climbs. Small changes in cord length or wraps can make a noticeable difference in how the hitch feels when you break it.
It is popular with climbers who run a traditional friction hitch and want finer control on descent without moving to a mechanical device. It also suits newer climbers who struggle to break a tight hitch smoothly, provided they are learning under a qualified trainer.
Pair it with a quality eye-and-eye cord from our eye-and-eye prusiks section, or compare it with a hitch-tending pulley such as the DMM Hitch Climber.
Some climbers also like it for training days, because it makes the moment of release easier to see and explain to someone learning the hitch.
Check the device for burrs, sharp edges and grooving where cord or rope runs over it, and retire it if you find cracks or deformation. Inspect the hitch cord at the same time, paying attention to glazing, flat spots and stiff sections that come from heat during long descents.
Wipe sap and grit off the device after use. Contaminants on any surface the hitch contacts can change how the hitch grabs.
| Type | Friction hitch tending and release aid |
|---|---|
| Brand | Big Jim's |
| Works with | Eye-and-eye friction hitch cords |
| Systems | Moving rope (MRS) and stationary rope (SRS) hitch setups |
| Moving parts | None |
Specs are from the manufacturer's published figures where available. Confirm against the product listing before you buy.
It can, for climbers who want a simpler way to break and tend the hitch. A pulley tends slack more smoothly as you advance; a breaker focuses on control at the hitch. Some climbers prefer one, some the other.
It is generally used with common eye-and-eye hitches such as the Distel and Valdotain Tresse. Follow the maker's guidance and test the setup on the ground before climbing.
It sits in your climbing system, so treat it with the same care as any other part of it. Use it only as the manufacturer intends and inspect it before each climb.