Anyone ever heard of a Spinco air impact ?...........I suspect it may be a Taiwanese copy of an IR .........I bought a pallet lot of them maybe 40 years ago,now .......Anyhoo,they didnt work ,they would turn ,but not hammer .........I saved two of them ,still have them ,a standard length and an extended shaft ........the extended would do dual wheels on my old crane ,and it did work well enough to remove the wheel nuts and do them up again..........The standard ones simply would not work as impact guns.