ART Lockjack Sport with Swivel Rigging Plates & Hubs These will be great for

These will be great for the crew members that spend the most time around the chipper being exposed to greater and more prolonged noise

For efficient movement within the tree:

Harrison Rocket Throw Bag

Max User Weight > 240kg (500lbs)

It's very sensible to replace these to maintain the level of noise protection

ART Lockjack Sport with Swivel Rigging Plates & Hubs These will be great forThe Lockjack was the first piece of hardware on the market that could totally replace the friction hitches used on climbing lines. Like a Mechanical Prusik, the Lockjack works as both an ascender and as a descender in the doubled rope technique (DdRT). The advantage of the Lockjack is that friction is applied to the rope with a smooth aluminum surface which causes less friction while climbing for an effortless advance, and a smoother more easily