Master Lock Model 410BLK 410 Thermoplastic Safety PadLock 1-1/2in (38mm) wide, 1-3/4in (44mm) tall Thermoplastic black body, shackle with 1-1/2in (38mm) clearance. Designed exclusively for Lockut tagout applications. Durable, lightweight, non-conductive Thermoplastic Lockbody. Customize on-site with permanent, write-on labels. Compliance with "One Employee, One Lock One Key" directive directive. High security, reserved-for-safety cylinder. Key retaining - ensures that padLockis not left unLockd. Keyed different, 6-pin tumbler with over 40,000 available key changes cylinder, Shelf Pack Qty 6, Master Carton Qty 36.