This is the industry standard used by every rigger to haul steel cable slings and baskets up and down from the grid.

Made by Klein, its actual name is a "Haven Grip." This is the large size. It is used for cable from 1/8" to 1/2" in diameter. This clamp has a locking device to keep the cable from slipping out.

 

#29010L 262/263 Klein Tool (large)  $89.95
Quantity:

Klein Tool (small)
Non-locking version of the large tool made for cable sizes from 1/16" to 1/4"