Tac-Force Checkered Aluminum Covered Black Speedster Knife. The knife makes an excellent EDC, with a 3 inch 440 stainless steel blade attached to the 4-inch black aluminum coated stainless steel handle, coming in at a bit smaller than most regular knives yet still being effective while also being cost efficient and space conservative. When the knife is in the closed position, the blade is held in place by means of torsion springs; as the user applies manual pressure to the ambidextrous thumb studs to open the knife, mechanisms such as the torsion spring moves along a track in the liner and rapidly rotates the blade into the open and locked position. Features built-in flipper, ambidextrous thumb studs, lanyard loops, pocket clip, and checkered black aluminum coated handle.