CARAPEAK Zip Line Trolley with Carabiner Fits Cable up to 1/2 Inches, 30kN Zipline Dual Pulley with 25kN Steel Karabiner for Backyard, Homemade, Fits 1/4 5/16 3/8 1/2" Cable

Perfect, 4 months of ziplining over my 75ft backyard steel wire. Pulley holds well, no sign of steel wire destroying the pulleys they work super smooth and very fast. The supplied hook very strong and perfect to attach supporting seats.Before this I tried many custom pulley designs but needed one with bearing as otherwise the pulley system will show down drastically. This one had double bearings

I have a 100' long zip line made out of 5/16" stainless steel cable. The trolley wheels just don't roll easily and smooth. Probably just poor quality bearings and a lower spec like abec 3 or so. Look for a trolley with abec 7 or higher bearings or a trolley you can rebuild the wheels on yourself and replace your own bearings as you can't rebuild these. The construction is very good, the biner is good quality and strong and I'm sure it'll last forever. I think if you have a 1/2 zip line it might roll better as the U groove in the wheels I think need more cable contact to roll better with the crappy bearings.

I'd first used a hardware store cable pulley, not something meant for Zip-Lining. This is much faster and goes farther along the line. I don't know if more expensive models would be better, but I sure like the price of this one.

Used it on 1/4 cable 200 feet long for my dog to be able to run it works great so far I know he enjoys it

Whoaaa so much faster than the "hardware store" version I made with youtubez help. Just make sure to not slam into a tree now!!

Well made and safe. Appears to be climbing quality

Great trolly, much faster and way smoother than our previous one.

Been working well for several weeks on the new zip line!