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 dial feature permit operation with gloves, in low light, or complete darkness Deadlocking mechanism protects against prying, shimming, and rap attacks Octagonal and round (1175LHRS) boron-carbide shackles for excellent cut resistance Stainless steel (SS) shackle (1174 and 1175LHSS) for additional corrosion resistance Shackle seal and dial dust cover protect internal components and dials for trouble-free operation Shrouded brass, solid brass, stainless steel, and zinc die cast body styles available.