I like them.

Tech Specs:

Material:

[heads] 100% aluminum; [cable] 100% steel 

Strength:

[1] 7 kN; [2] 9 kN; [3] 11 kN; [4] 12 kN; [5] 12 kN; [6] 12 kN; [7] 12 kN; [8] 12 kN; [9] 12 kN; [10] 12 kN; [11] 12 kN 

Weight:

(1) 0.5 oz, (2-5) 1 oz, (6-7) 1.5 oz, (8) 1.6 oz, (9-10) 1.9 oz, (11) 2.5 oz 

Manufacturer Warranty:

1 year