Nah you want the driver..I have both. Wrench looks like a ratchet run on air(typically 3/8"). Not much torque, driver is as pictured (3/8" or 1/2".)
See now I've always known those to be Air ratchets, not Impact. HAAh How confusing.
Anyhoo I got to googling and from what I found I think I was correct, again these are known by many names. Impact Driver
Unfortunately people misuse terms/names all the time and soon they become common place vernacular. This is a prime example. Some folks also use the term "air gun". Not to be confused with an "air ratchet", or a manual "impact driver".
__________________ 2007 FJ, 5AT, Sun Fusion Yellow, CQ, UP, GY, RB, 2Q, EL, VS.
"Wanted - young, skinny, wiry fellows, not over 18. Must be expert riders willing to risk death daily. Orphans preferred"
Original newspaper add placed by William Hepburn Russell, founder of the The Pony Express
An air impact wrench uses a "hammer" and an "anvil" to create torque. A puff of compressed air throws the hammer forward and on the front of the hammer is a crown of slanted faces. The back of the anvil also has a crown of slanted faces and when the hammer hits them, it twists the anvil to the side. That's the "impact". Different units are rated for different maximal torque based on the angles on the hammer and anvil and on the force with which the hammer hits.
A manual impact wrench uses a hammer blow onto the back of the unit to accomplish the same torsional spike force by way of the same mechanism.
I've mostly heard people use the terms "impact wrench" and "impact driver" interchangeably, but that doesn't prove a thing. There could very well be a defined difference, but I haven't come across it.
An air ratchet uses a rotary mechanism powered by the compressed air and has much less torque, but it does a fantastic job of driving the many many full turns that it takes to put a connector like a bolt into it's place. Final torque specs are achieved using a torque wrench.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.