The Simpson Strong-Tie TNT25134H Titen Turbo™ 1/4" x 1-3/4" Hex Head Screw Anchor is fast and easy to install, and incredibly reliable in its performance. The secret behind the performance of the Titen Turbo™ lies in a thread design that lowers driving torque while providing superior holding power. The revolutionary To Simpson TNT25134H 1/4" x 1-3/4" Hex Head Titen Turbo™ Concrete Screws (100/Box)