IronMind's loading pins and carabiners provide an easy way to hold some barbell plates that you want to attach to anything from a Rolling Thunder to a De Rigueur Dipping Belt.* First offered in 1990, they have been part of many a strong guy's workout ever since.If you are looking to get certified on the Rolling Thunder, Pinch Block or IronMind Hub you will need this loading pin to enter.  For more information on the rules please click on link below.Rolling Thunder® One-Hand Deadlift Rules and Official Referee FormThe Olympic loading pin is 15" long and 2" in diameter and takes Olympic plates; use with the super-duty large carabiner, which holds loads up to 6,600 lb. (yep!).15" Olympic plate loading pin only (no carabiner)*IronMind equipment that requires a loading pin to hold the weight: Rolling Thunder Revolving Deadlift Handle, Hub-style Pinch Gripper, Blockbuster Pinch Grip Block, One Wicked Wrist Roller, Little Big Horn, Outer Limits Loops, Claw Curl, and R-Ring.A loading pin makes weight changes easy on our Twist Yo' Wrist, De Rigueur Dipping Belt, SUPER SQUATS Hip Belt, and Headstrap Fit for Hercules.