Dual metal guardrails on both sides of the lock button provide superior protection to keep this tape going strong on the toughest job sites.| Dual sided high contrast white markings and matte finish provides improved legibility in all light conditions.| 360 degree diamond abrasive-coated end hook provides 50% more hook grasp and prevents slippage from various surfaces.| Tether loop attachment point when working at height and is a pivot for scribing and measuring circles or arcs.| Provides users a case that fits comfortably in your palm.