Maxam "The Rock" Extra Heavy-Duty Lockback Knife This knife features a durable Leymar handle and AISI420 stainless Japanese steel blade that is 1/8 thick, nearly twice as thick as many ordinary pocket knives, which provides for a more secure lock. Comes with a heavy-duty Kelvlon sheath. Measures 4-7/8 closed, 8-7/16 open. Limited lifetime warranty. Gift boxed. AISI420 Stainless Japanese Steel Blade Durable Leymar Handle Heavy-Duty Kelvlon Sheath Measures 4-7/8 Closed, 8-7/16 Open Limited Lifetime Warranty Extra Heavy-Duty Lockback Knife