Value Range Padlocks Security Rating: 1-3 Basic protection for barrier and deterrent applications. Lockwood Solid Brass 110 Series PadlocksPadlocks Physical Security (SP) grade up to 4. Lockwood Stainless Steel 140 Series Combination PadlockPadlocks Physical Security (SP) grade 3. Lockwood Stainless Steel 141 Series Combination Padlock with Key OveridePadlocks Physical Security (SP) grade 3. Lockwood Solid Brass 150 Series Combination Padlocks1,000 resettable combinations.