This sound effect was recorded with high quality sound equipment and comes from a sound library called Metal Contact which is pack of 136 high quality audio files with a total length of 230 minutes. In this library you'll find different metal sound effects recorded with contact microphone. You can use this sound for free, and if you need a whole package of ambients you can support my work and get it for 40$ here: <a href="http://soundholder.com/product/sound-library-metal-contact/" rel="nofollow">http://soundholder.com/product/sound-library-metal-contact/</a> Also here's a 10% discount code for all freesound users, just type : freesound in discount window. Enjoy!