Product Features: ProSeries® resettable combination locks are designed for Commercial/Industrial applications Set-your-own 4-digit combination for convenience and security; 10,000 possible combinations No reset tool required Large ergonomic dials with exclusive blind feature permit operation with gloves, in low light or complete darkness Deadlocking mechanism protects against prying, shimming and rap attacks Shackle seal and dial dust cover protect internal components and dials for trouble-free operation 2-1/4" (57mm) wide shrouded solid brass body for superior corrosion resistance 1-1/16" (28mm) octagonal boron-carbide shackle with shrouded feature for maximum cut resistance Best Used For: Utility Meters, Substations & Cable Boxes Construction Sites & Equipment Industrial, Storefront & Business Gates Manufacturing Environments A: 3/8" (9.5mm) B: 1" (25.4mm) C: 1" (25.4mm)