Master Lock 121T Wide Covered Padlock 2 Pack Black The Master Lock No. 121T Covered Solid Body Padlocks feature a 19mm wide black vinyl covered body for scratch and corrosion resistance. The 4mm diameter shackle is 11mm long and made of steel, offering resistance to cutting and sawing. Type: Lock Model or Style: Padlock Color: Black Size: .75" W Material: Steel Vinyl-Covered Function: Lock Btu: N/A