And I had a whole plethora of coils for it too. The smallest was the 5" mono and largest was a 15". The chain I was using is a 19" long 2mm rope chain in 10k. The TDI Pro wouldn't pick it up with ANY coil with it laying in any fashion. Even balled up it wouldn't pick it up. You must have a big chain or a exceptional TDI Pro because I've had 3 standard TDIs, one TDI Pro, and the TDI SL...and none of them will get these chains.