ACCESSIBILITY - The ball end of these Allen wrench hex keys allow for up to 30 degrees of misalignment with the fastener for easier access in tight spaces. COLOR CODED - Each size hex key Allen wrench is a different color for quick identification. DURABILITY - Manufactured with industrial grade alloy steel for strength and durability. The 96BP-CL series of metric ball-end hex Allen wrenches are color coded for quick identification. The ball-end allows for 30 degrees of misalignment with the fastener.