Master Lock 420 Lock-out Hasp with a 25mm diameter jaw for holding up to 6 padlocks with shackles up to 6.35mm in diameter. Thermoplastic Nylon non-conductive hasp that is anti-sparking & ideal for electric appliances Master Lock Lock-Out Hasp for up to 6 workers at each lockout point. Lock Hasps ensure that equipment & machinery remain inoperative while maintenance work is in progress.