491B Master Lock Lockout Circuit Breaker,Silver Please log in to see price or purchase this item Quantity discounts available QuantityPrice SKU: MLS491B Qty On Cart Features Innovative design for effective lockout of electrical shutoff points. Secure and simple mounting for a solid lockout. Grips tight with simple thumb tu... Features Back FeaturesInnovative design for effective lockout of electrical shutoff points. Secure and simple mounting for a solid lockout. Grips tight with simple thumb turn and clamping handle. Narrow profile permits side-by-side breaker lockout.