Outward/Inward Rotation Allows for Easier Installation & Storage. Surrounds the valve operating handle to protect against accidental valve opening. Each size rotates into itself to fit effectively into safety took boxes. Each size nests within the next larger size to save space in storage. Up to 4 workers can apply their personal safety locks. Red Lockout color identifies the safety lockout application. Complete with high visibility permanent safety labels (English, French, & Spanish) that can be written-on to identify the responsible person then erased for the next job. Tough lightweight, dielectric Xenoy1-1/4" thick x 1-5/8" Wide; thermoplastic bodies withstand chemicals; perform effectively in extreme conditions [temperature range -50úF (-46úC) to +350úF (117úC)].