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Your cart is empty.The 6.8mm HollowBlock2 is made of 100% Technora fiber for increased abrasion resistance and improved durability. It's gripping ability comes from the unique hollow-braid construction, for use as a prusik or Klemheist knot on ropes 7 mm or larger.
Joe Pickett
Reviewed in the United States on July 20, 2024
I Will be using this for a prussic knot for saddle hunting on the Line's man Belt. It is as advertised and works perfectly, Very high quality sewn loop.
Eric Palmer
Reviewed in the United States on October 28, 2024
I have bought several of these for myself and friends for use as an autoblock backup for rappelling. They work great.
jeff c.
Reviewed in the United States on July 13, 2022
Will be using as a backup prussic knot to the mammut smart 2.0 for saddle hunting. It is as advertised and works perfectly. Very high quality sewn loop.
Dawn Holt
Reviewed in the United States on February 23, 2019
I bought 2 of these for my climbing partner and I to use as a safety when we rap down off a climb. Seems like the older we get the less we want to die. These work great. 2 wraps is all we need, they hold great. I kind of wish I had got the longer ones but the shorter are just enough.
Alejandro
Reviewed in Mexico on October 3, 2019
excelente
chris b adams
Reviewed in the United States on May 6, 2017
This product works just as described. I use it as a friction hitch for rappelling back up. I climb 2-3 days per week and have been using the Hollow Block Loop for about 2 months. I use it every time I rappel and so far it's held up; it seems durable. I typically rappel using a doubled rope between 9.2-10.2mm. It bites the rope strands well. My rappel device is set up extended from my belay loop on my personal anchor system. The long size Hollow block has enough length. I think the short size would be too short for an extended rappel (and conversely the long size too long for a short set up) set-up but probably good if your device is connected directly to your belay loop.I only gave the HB 4 stars because while it's good, it's not a complete game changer. I wouldn't have a problem going back to using a 6mm diameter cord as a friction hitch back up. I don't think I'd see a huge difference between that and the HB. But the hollow block does what it says and it does it well enough.
Teddy Picker
Reviewed in the United States on December 13, 2017
This is clearly better than any of the competing products. This has a few features which differentiate it from other Prusik loops:1. It is rated to 19kN.2. Aramid fibers make it immune to melting.3. Hollow construction means it relies on flattening against the line, rather than biting like a thin accessory cord Prusik.4. Loosens more easily than thin accessory cord Prusiks.This isn't just numbers on a page either: this translates into practice. It's a pleasure to use the Hollow Block and I feel a lot safer with it than any other Prusik system I've used.
Buster Brown
Reviewed in the United States on September 12, 2016
This thing is a beauty if you're looking for a perfect prusik loop for gripping rope. It works amazingly well on the 7/16" rope I use, slides fairly easily against pulley when slack, and instantly grips like a vise when under tension. Flat surface and weave serves to provide incredible grip under tension. I use it for a progress capture in a 5:1 pulley system hauling very heavy wood up a steep side of a ravine and pulled one long log until it was suspended from the anchor fairly far up a tree trunk and released the pull rope. The heavy load was held entirely by this loop with no signs of trouble. A really great product that's fantastic for what it's designed for. I found myself wanting another, perhaps the slightly longer version, as I have a round prusik with two sewn loop ends that I thought I'd use to anchor the lower pulley against the rope to the load, and though it works, it takes some doing to set the knot. While one of these grips instantly and easily.
MyRealReview
Reviewed in the United States on August 4, 2016
This bites into a rope better than either a nylon or dyneema slings. Especially since ropes are getting thinner and thinner, "bite" is a more important consideration.I climb exclusively on dyneema slings. After a conversation with a very experienced climber about the low melting point of dyneema when used as a rap backup, I bought this. I can say that it is just another level of safety, and I am glad to have it.I bought the shorter length, and it is perfect for rap backups.The only downside is that this is not full strength, and therefore not as versatile. It is small and light on your harness, but I still prefer to carry equipment with many uses. This is a specialty piece who's only purpose is friction hitches.
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