Customer Service: (800) 268-2141 (M-F 7AM to 5PM)
Customer Service: (800) 268-2141
(M-F 7AM to 5PM)  Contact || Help
Ascension group logo
wesspur youtube logo
wesspur instagram logo
Facebook logo
wesspur newsletter icon
Free Catalog of Tree Climbing Supplies and more
Free shipping on tree gear
Your shopping cart: Items, Total   View Cart or Checkout
Lockjack Sport image

Lockjack Sport

(Rollover thumbnails to change pic, click to enlarge)
 Lockjack Sport Mechanical Friction Hitch  Lockjack Sport by ART

Lockjack Sport

Buy the Lockjack Sport

Lockjack Sport
ASC116
Lockjack Sport with Swivel Adapter
ASC187

Buy Lockjack Sport Replacement Parts

11-12mm Clutch
ASC140
12-13mm Clutch
ASC135
Friction Plate
ASC909

Buy Lockjack Sport Add-ons

Swivel Adapter
ASC141

The Lockjack can totally replace the friction hitches used on climbing lines. The Lockjack works as both an ascender and as a descender for self-belay 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 controlled descent.

While climbing, the Lockjack tends slack by itself as the weight of rope below the climber pulls the line through the device. Works with 7/16” or 1/2” rope with a simple part change of the clutch (both clutch sizes are included.) Use with a small D or Oval carabiner only. A larger carabiner may allow the wooden ball to pass through and become stuck, resulting in free fall.

ASC116

Free shipping on this tree gear No-hassle returns on tree gear

Customer Reviews

Rated: Excellent Review by: Daniel

“ I have climbed commercially on one of these for six years. I have had to replace that where parts on at least three occasions I still enjoy climbing with it. It does have a tendency to creep up the rope when there is light load on it. It takes some getting used to especially when used with a friction saver. I would recommend if you get a chance to try one out give it a go. ”

Additional Features

  • Smooth friction
  • Precision control
  • Ascend in DdRT
  • Descend in DdRT
  • Easy advancement
Manufacturer : ART
Made in : Germany
Min Rope Size : 7/16” (11mm)
Max Rope Size : 1/2” (13mm)
Weighs : 9.6 oz (292 g)

The Lockjack is a comfortable, efficient and easy to handle device invented by Hubert Kowalewski to assist tree climbers all over the world. The Lockjack Sport offers every climber, beginner or pro, safe, dynamic and energy saving climbing in trees. The Lockjack allows for efficient ascent on the climbing line or along the trunk. In the tree crown a one-handed pull on the rope is enough to manage slack.

While beginning an ascent, it is easy for the climber to feed the rope from top with one hand through the rope duct on the Lockjack. After ascending a few meters, the weight of the rope below the climber is enough to pull the slack through the Lockjack.

The Lockjack can be customized with the ART Lockjack Swivel Adapter which allows the Lockjack to compensate for twists and turns of rope and the climber. Combined with the Ropeguide the Lockjack Sport has in recent years much added to the efforts in establishing an efficient as well as safe climbing style.

Safety & Technical Information

Lockjack Sport Instructions

Certifications

  • CE EN 358

ANSI Z133-2012

The American National Standards Institute (ANSI) has released the ANSI Z133 safety requirements which apply to arboriculutral operations.

This item is ANSI compliant.

The full ANSI Z133 safety requirements are available on our tree care standards page.

Video

Contents of this site are copyright 2010 by WesSpur Tree Equipment, and may not be used without written permission.