The Victorinox Sentry Swiss Army knife is the simplest possible version of Swiss Army knife.

It has only one large blade, which makes it a simple, affordable pocket knife that takes up a bare minimum of space in your pocket.

NOTE-- This model is sometimes called the Junior.

Alpineer-- adds a corkscrew, much larger size (4 1/4 " 111 mm)
Bantam-- adds a bottle opener, tweezers and toothpick
Escort-- Smaller, 2 1/4" (58mm) knife that adds a nail file, tweezers and toothpick
Gardener-- a longer single-bladed knife
Pioneer Apprentice-- Larger 3 1/2" (91mm) knife that adds a second blade
Pocket Pal-- Adds a second, smaller blade
Sentry BSA-- adds Boy Scouts logo
Solo-- larger size (3 1/4" 91 mm) and rounder profile