Master Lock Pro Series Resettable Combination Locks Are Set-Your-Own 4-Digit Combination Padlocks With Over 10,000 Possible Combinations Designed for Commercial & Industrial Use. Master Lock ProSeries Padlocks Include the 1174 (Stainless Steel), 1177 (Shrouded Shackle), 1175LHSS (Stainless Steel Shackle), 1175 & 1175LH (Brass Resettable) & 1178 (Black Zinc Diecast Resettable).