at first look i thought this was a graet idea, OOOHHHH but how wrong i was!!!! the spring in this driver only makes it harder to drive a T post. it takes a lot lot more physical effort to make the driver contact the post. i would never buy this driver or recommend it to a friend (maybe to someone i don't like) I took the driver to the barn and used a chisel to remove the weld spot and took the spring out!! now i have a rael post driver.