that is really cool. id love to be able to find one of those now i know they exist.
"I dont use speeders often, but when i do, im already half way done, and forgot i even have them"
example, a few weeks ago i was doing the transmission filter on my 94 blazer. it has about 25 13 or 15mm bolts holding the pan on. after getting about 8 of then started. Light bulb! got the speeder i have, and whizzed them right in. Perfect. something like that you wouldnt want to use an impact as the torque specs are only 13 INCH lbs.
the other day at sears i picked up a usa 1/4 speeder for $9. usually about $17. the reason i picked up a 1/4 is for interior work because its less bulky then my 3/8 speeder. almost picked up the 1/2 at a pawn shop but just figured if im already using something with the size of a speeder, i can just slap a 3/8 to 1/2 adapter.