These cams used to be sold by Trango as Flexcams. The Durango cams are lightweight, single stem cams with milled cam stops and are excellent for protecting vertical and horizontal cracks and pockets. Similar to the Comets, they differ in that the stem is a bit more flexible, the spectra sling is adjustable, and the cable stem is looped on the end. This loop allows you to clip directly to the stem - helpful for aid climbing - and provides an easy-to-use place to put your thumb when operating the trigger. The full set includes 8 sizes: 0.25, 0.5, 0.75, 1, 2, 3, 4, and 5, and covers a range from 0.47" to 3.54". Rated at 9 kN (smaller sizes) to 12 kN (bigger sizes), UIAA passed and CE certified. Specs: #.25 (Green), Range (12-16 mm), Wt (55 g), Strength (9 kN) #.50 (Purple), Range (14-20 mm), Wt (59 g), Strength (10 kN) #.75 (Red), Range (17-24.5 mm), Wt (62 g), Strength (10 kN) #1.0 (White), Range (20-29 mm), Wt (92 g), Strength (15 kN) #2.0 (Yellow), Range (27-41 mm), Wt (106 g), Strength (15 kN) #3.0 (Blue), Range (35-53 mm), Wt (140 g), Strength (15 kN) #4.0 (Red), Range (48-67 mm), Wt (167 g), Strength (15 kN) #5.0 (Black), Range (61-91 mm), Wt (213 g), Strength (15 kN)