Great for keying anything needing a tapered key bit.  Heavy steel blank key has an overall length of 3 1/8". 

Measurements below could differ slight depending upon the castings, you can compare these measurements to the chart in the photos if you are unfamiliar with the terms.

Total Length: 3 1/8"

Shank Length: 2.220"

Shank Diameter: .201"

Post: .95"

Bit Width: .629"

Bit Length: .759"

Collar: .269"

It has a tapered face.

Very hard to find if you are working on restoring or keying an old rim lock. We exhausted every supply we could find before deciding to have some made.                                                                                                              Postage is programed to charge $3.85 for the first key and $.85 for each additional key.