Using the same trigger system and essential components as the 3CU, these larger and ultimately more stable 4-cam units are designed to provide maximum security when it matters most. The attention to detail in every aspect means they're light but phenomenally strong, and made with the finest materials, making the entire range durable and dependable. They are color-coded, with the size clearly marked on the cams, for ease of identification. The smooth inboard and outboard trigger action allows quick easy placement and drilled retrieval holes in the trigger bar mean they needn't be 'lost in the rock'. The body of each has been carefully sculptured to reduce weight while eliminating the 'tangle factor' drilled holes create. Across the range of sizes - .5, .75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4 - each device provides versatility and security of protection today's climber can't afford to be without.