Shape Up, Training Key-Shaped Folding Knife Fitness, Sport, Exercise Key Shape & Size with Hole for Adding to Key Chain Blade has 1-5/16" Sharp Edge with Mechanism to Hold Blade in Position from Open to Closed Blade Thumb Groove Remains Accessible When Closed Shiny Polished Metal Blade Comes Very Sharp Dimensions: 2-11/64" L (Folded) & 3-11/16" L (Unfolded) x 7/8" W x 7/32" Thick