Trimax Industrial 5/8" Dia.Receiver Lock Twister Series with Flat Keys TK225, Clam Packaging, ChromeTrimax TK225 Dare to compare! TRIMAX, the leader in Receiver Locking Pins, has spent the last 10 years expanding and improving on the "ORIGINAL." The Patented Dual Lock Lug Design offers over 5,800 lbs. of head pull strength. A 1 4 turn of the rugged tube key locks & unlocks the strongest locking pin on the market. Don't settle for low quality knockoffs! The TK225 features a dual twisting lock head and end portion that makes the lock resistant to saw