How much is your hand....or arm....or life worth???
"For example, during one bite test the highest force applied by a single tooth was 60 kilograms (132 pounds). Since it was estimated that the 60 kilograms were applied over an area of 2 square millimeters, this means a loading of 30 kilograms per square millimeter. This equates to a force of 3 metric tons (6,000 pounds) per square centimeter! In practice, the tooth would shatter before actually reaching this pressure. There is no question sharks can do severe damage if they apply the full pressure of their bite, which is often not the case.
Even small sharks, and you said 4-6 feet, can do terrible damage...forget about the lure!!
Call me a coward, but after talking to a couple of people who have had bad experinces, I feel the same way about stingrays and rigs.