1K keyway 4-pin Padlock Cylinder only for rekeyable Pro Series padlocks. Compatible with models 6121, 6125, 6127, 6230, 6321, 6325, 6327, 6830, 6835, 6840, 6850, 7030, 7040, 7045, 7050 series locks. Specify required keying options. Cylinders are supplied with 2 keys. Keyed different - Random Keying. Zero bitted (Not properly keyed) - Zero bitted cylinders- need to be keyed by in-house personnel or a Locksmith. You can order these with the quick ship custom keyed options - if you need a few locks keyed to your specific key number. We can process quick ship orders normally in 1-2 days. Factory keyed cylinders have an estimated lead time of 3-4 weeks before shipping.