The Master Lock No. 121Q Covered Solid Body Padlocks features a 3/4\” (19 mm) wide black vinyl covered body for scratch and corrosion resistance. The 5/32 (4 mm) diameter shackle is 7/16 (11 mm) long and made of steel, offering resistance to cutting and sawing. Black vinyl covered body for scratch resistance Made of corrosion resistant materials Steel shackle 3-pin cylinder Matching coloured key head for added convenience Keyed alike – same key opens all four locks 4 pack