Pan-Steel® Self-locking Cable Ties speed up installation with a unique self-locking head design that locks into any part of the tie. Plus, the smooth edges of 316 stainless steel promote worker safety in indoor, outdoor and underground environments. Heavy cross section, Max bundle diameter: 4in, 14.3in, Tensile strength: 2000, 50pc.KEY FEATURES AND BENEFITS:• Self-locking head design speeds installation and locks into place at any length along the tie body• Provides a strong, durable method of cable bundling• Can be used in a wide range of indoor, outdoor, and underground (including direct burial) applications• Smooth surfaces and rounded edges assures cable protection and worker safety