Product Description The Master Lock 1177D ProSeries Resettable Combination Padlock is designed for industrial applications and features a 2-1/4in (57mm) wide shrouded solid brass body for superior corrosion resistance and a 1-1/16in (28mm) tall, 3/8in (10mm) diameter octagonal boron-carbide shackle with shrouded feature for ultimate cut resistance. Set your own combination offers convenience and security with 10,000 possible combinations no reset tool required and a deadlocking mechanism protects against prying, shimming and rap attacks. From the Manufacturer Designed for today's security requirements, the new 1177D ProSeries Resettable Combination Locks combine the strength and weatherability needed to withstand harsh treatment and tough environments. Available in brass these locks have new features that improve weatherability: the dial dust cover and the shackle seals keep dust and grit out of the internal mechanisms for trouble-free operation. Stainless steel shackles are also available on some models. These ProSeries locks stand up to physical attacks like no other resettable can. The enhanced octagonal boron-carbide shackles are twice as hard to cut as standard hardened shackles and the dead-locking mechanism holds against pry, shim and rap attacks. The ProSeries Resettable Combination locks combine these security improvements with added user convenience. With 10,000 possible combinations, the large ergonomic dials permit operation with gloves, in low light or complete darkness. These locks are also easily set with no special reset tool required. ProSeries resettable combination locks are designed for commercial and industrial applications.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit. 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 Shackle seal and dial dust cover protect internal components and dials for trouble free operation Included Components: Unit Instruction Guide