The Boker Plus Thunder Storm, designed by Boris Manasherov, is a rugged tactical knife that has been expertly converted to an automatic knife using a USA made spring that puts automatic knives that sell for hundreds more to shame. Come with an AUS-8 steel and the handle scales are milled from aluminum with weight-reducing jimpings. Blade: 2.875" Overall: 7.25" Closed: 4.5" Weight: 3.44 oz.