Master lock Model No. 6270. Keyed Different Rekeyable. 2-7/8in (73mm) Wide ProSeries® Chrome Plated Solid Steel Hidden Shackle Rekeyable Pin Tumbler Padlock. Product Features ProSeries® Padlocks are designed for Commercial/Industrial applications. Lock body conceals shackle - defeats attempts to pry and cut 2-7/8in (73mm) wide hardened solid steel body withstands forcible attacks 3/8in (9mm) diameter boron alloy shackle High security, rekeyable 6-pin cylinder with spool pins is virtually impossible to pick. The Lock body conceals the shackle, defeating attempts to pry and cut. Ideal for transportation, vending & industrial applications, the high security, rekeyable 6-pin cylinder with spool pins is virtually impossible to pick.