Mounting clamps for Leer, Century, ARE, Ranch, Jason, Raider, and other truck topper and tonneau cover brands. Several different clamps to choose from. Tite Lok Clamp #3TL250 (picture of actual item) Description: Tite Lok Clamp #3TL250 - Designed for 1999 - Current Ford F250/350 Super Duty & 2004 - Current Ford F150's on Toppers with Aluminum Rails (aluminum toppers) - Gives the needed Reach