jumars

With fixed ropes, climbers can attach jumars -- clamp like devices that work similar to a jam cleat on a sailboat or the mechanism inside your car seat belt -- to protect themselves incase of a slip.

Freddie Wilkinson: Avalanche Triggers Survival Situation on K2 2008

Lewis laid out his stirrups and jumars for ascending the rope, and tied his shoes.

The Wall Jeff Long 2005

He slid the jumars up, one at a time, high-stepping in the stirrups that dangled from each handle.

The Wall Jeff Long 2005

He clamped on his jumars, stepped into the stirrups, and began climbing away from the Ark.

The Wall Jeff Long 2005

Beyond the roof, the only tools necessary would be jumars and stirrups and muscle.

The Wall Jeff Long 2005

Sputtering and battered, he reached for his jumars.

The Wall Jeff Long 2005

Because they were heading diagonally, he had to mind the jumars with special care.

The Wall Jeff Long 2005

He cinched the jumars tight, and stepped off into outer space.

The Wall Jeff Long 2005

As Augustine had pointed out, the jumars would clog with ice and that would cost more time.

The Wall Jeff Long 2005

Augustine lifted his jumars, one in each hand like cardio-shock paddles, and fastened on to the rope.

The Wall Jeff Long 2005