Master Lock M15XLF Keyed Padlock 7/16 in Shackle Steel

Padlock for Lockout and Security

This Master Lock M15XLF padlock is designed for lockout/tagout procedures and general security applications. Its laminated steel body and boron shackle provide physical resistance for industrial or commercial use. The five-pin cylinder uses a Master K1 keyway with keys cut differently for each lock. Buyers who need weather-resistant construction or interchangeable cores should look elsewhere.

Sustained Physical Resistance

The hardened boron shackle resists cutting and sawing during prolonged attack attempts. Laminated steel body layers absorb impact and prying forces over time without structural failure. The single bumper reduces internal wear from repeated shackle cycling in high-frequency use. High-security rating reflects performance under sustained mechanical stress rather than brief exposure.

Straightforward Installation Steps

The 7/16 inch shackle diameter fits standard hasps and chain links without modification. Insert the shackle through the attachment point and press down until the locking mechanism engages audibly. The 1 1/2 inch shackle height clears most staple thicknesses encountered in typical lockout points. Misalignment between the shackle and body holes is the most common cause of difficult locking or key rotation.