Mtech Spring Assisted Knife 3.5in 3CR13 Stainless Steel Harpoon Point Black Blade Aluminum/Pakkawood Handle Blue. The knife is easy to carry and easy to carry on a daily basis. The knife is spring loaded so the user does not need to struggle with opening the knife. The liner lock secures the blades once the desired opening tension is reached. Once the desired opening tension is reached the locking bar will "lock" the blades open. Once the desired opening tension is reached the locking bar will "lock" the blades closed and the user can manually open the blades with out using the spring assist. A new series of these knives featuring M-Tech assisted opening mechanisms are being introduced to the public. We are proud to introduce these new knives to the public. Specifications for Mtech MT-A1086 3.5in Spring Assisted Knife: Manufacturer: Mtech Blade Length: 3.5 in Blade Material: 3Cr13 Serrated: Plain Overall Length: 8.25 in Handle Length: 4.5 in Handle Color: Blue Handle Finish: Anodized Blade Finish: Black Blade Shape: Spear Point Opening Method: Spring Assisted Additional Features: Clip Color: Blue Package Contents: Mtech MT-A1086 3.5in Spring Assisted Knife Mtech MT-A1086BL: MT-A1086BL Spring Assisted Knife 3.5in 3CR13 Stainless Steel Harpoon Point Black Blade Aluminum/Pakkawood Handle Blue