We were impressed with Atlas Devices' Rope Ascender when we saw it earlier this year, but the company, run by 24-year-old Nathan Ball, has refined the original design and is ready to start marketing the third generation of the device. Hack A Day got to play with one and they found that the new version is not only easier to use and less damaging to the rope, but also lighter and more efficient. Atlas is initially pitching these at the military, but we can see these being huge hits with the high school gym class market.