Kaba Ilco Taylor Schlage Key Blank, 250CT

They come 250 to a box, and 250 is the order increment, so this is a shop or service-truck quantity rather than a handful for one job. A locksmith cutting Schlage-keyway duplicates day to day is the buyer this pack size is built around; a property manager rekeying a few doors would be buying far more blanks than the job needs.

Keyways don't cross brands. The SC4 is the Schlage profile and only enters Schlage-keyway cylinders. For Corbin Russwin cylinders you need a Corbin blank, such as the Corbin Russwin 027-6PIN-10 in the 027 master section, or the Corbin Russwin single section standard bow blank in nickel silver. Buying the wrong profile means the blank will not enter the plug at all, cut or not.

Yes for the blank side of the job. Keying alike is done at the cylinder, by pinning every lock to one bitting, and then all the operating keys are cut the same on SC4 blanks. Buying blanks in bulk is what makes that practical across a portfolio, since one bitting on the Schlage keyway can serve every door you have pinned to match.

SC4 is the six-pin Schlage blank. If your cylinders are five-pin Schlage, a six-pin blank still works because the extra cut position simply goes unused, but a five-pin blank cannot be cut for a six-pin cylinder. Stocking the six-pin covers both.

Yes. These ship uncut, so you need a duplicator or code machine to produce a working key. Contractors and property managers without a machine are better served ordering keys cut, not blanks in a 250 box.