Single Blade BOSS Blade Lock Pocket Knife. 5-1/2 inches closed. 9-1/2 inches open. Made in USA. "CASE XX P172L SSP" and " ********** HAND MADE USA" (10 dot with lightning bolt S) tang stamps. Single oval open-C "CASE" shield. Stainless steel blade. Laminated Pakkawood handle. Nickel Silver bolsters and brass liner. The Boss is the only clasp made with a blade lock.