1/2 Impact Wrench JAP450 It was working fine, but when connected to a hose with high air pressure, it would start spinning on its own, so I'm selling it because I'm replacing it. Someone with knowledge might be able to disassemble and fix it, but I'm selling it as junk (as is) at a bargain price. Price reduction is not possible. KTC impact wrench for air connection - Brand: KTC - Type: Impact Driver - Color: Black/Silver - Connection Type: Air Connection Thank you for viewing.