Our Tornado 1” Split Key Rings are made of spring tempered steel. After being constructed they are plated in bright nickel to prevent corrosion. Our keyrings are easy to open, keep their original shape, and are made for ease of use.
Diameters vary.
Outside: 1.100”
Inside: .932”
A Dimension: .084”
B Dimension: .110”
Wire diameter: .072”

COVIDIEN Webcol Alcohol Prep, Sterile, Medium, 2-Ply Pad, Pack of 200 

