Everyone who's been to a velodrome has used a TL-SR22 at least once in their life. You see guys and girls with ones in their kit which look like they pre-date cycling itself. 

Designed to last a lifetime, the TL-SR22 might be the most functional and strong of the chain type Sprocket Removers.

Made from 5mm Plate, these don't flex an they make changing gears a dream.