This material is Stainless Steel
Product Name "Screwdriver Ring".
Available in either stainless steel (antique bronze & gold plated)
The default size is 20.6 mm inner diameter but you can customize the size to your liking.
Click personalize to choose your US ring size.(Size support: # 8 to # 13.)
Please refer to a this page
. Conversion chart for ring sizes
US Ring Size Inside diameter
13 22.2mmPlease also see other designs.
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3.142 w x
2.774 d x
1.237 w x
1.092 d x