http://www.amazon.com/DMM-Phantom-Carabiner-Gold-Gate/dp/B002DIDO4Q/ref=sr_1_1

Specification can be found here

http://www.rockrun.com/dmm-phantom-screwgate/

Overall length is 93 mm or around 3 1/2 inches but is very light weight when rated for over 5000 lbs