The Kershaw 1556TI / 1556BLK/ 1555 TI CRYO II Spring Assisted Flipper Knife. This knife is 4.5" closed and has a blade that is 3.25" and utilizes a strong frame lock. This knife features a finger flipper speed safe opening design. You can open this knife with one finger. This knife is 5.4 ounces in weight.