CRKT Tighe Tac Two EDC Folding Pocket Knife: Everyday Carry, Satin Blade, Button Lock, Tighe Ball Bearings, Textured Nylon Handle, Deep Carry Pocket Clip 5230 Tighe ball bearings pivot system Button lock Flipper deployment Designed by Brian Tighe Limited Lifetime Warranty covers any defects in materials or workmanship, see company site for details