Master Lock 121Q 4-Count 3/4" Black Vinyl Cover Brass Padlock The Master Lock No. 121Q Covered Solid Body Padlocks feature a 3/4in (19mm) wide black vinyl covered body for scratch and corrosion resistance The 5/32in (4mm) diameter shackle is 7/16in (11mm) long and made of steel, offering resistance to cutting and sawing Matching colored key head for added convenience Keyed Alike - same key opens all four locks Steel shackle and 3 pin cylinder