Single-pole lockouts for switch breakers with and without a recessed hole will accommodate breakers up to 9/16 in. (14 mm) width. Double-pole lockout requires that there be two toggles connected together with a crossbar. This model will accommodate double or triple breakers and will fit most major brands of electrical circuit breakers. Constructed of rigid plastic. Breaker must be in the "off" position before installing.
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Colonial Scientific has teamed up with the industry leaders, Fisher Scientific and VWR, and now offers their entire product line. Colonial Scientific provides any part from the Fisher Scientific site with a part number.