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Gold & Platinum Finger Fit Expandable Ring Shank 3x3mm

Part # 70-17 Only 1 left Weight -- lb -- g
Current price $780.89
Metal Types: 14K Yellow
Ring Size: 2 to 5-1/2

The Finger Fit is an expandable, hinged ring shank designed to solve one of the most common fitting challenges in jewelry: rings that fit over the knuckle but are too loose on the finger. The shank opens, allows the ring to pass over the knuckle, then closes and locks for a comfortable, secure fit — no resizing required.

These Finger Fit shanks measure 3mm x 3mm in shank diameter and are available in 14K Yellow Gold, 14K White Gold, 18K Yellow Gold, and Platinum. Two size ranges are offered to cover most finger sizes from 2 through 9.

Features

  • Easy installation: Finger Fit shanks attach to an existing ring without redesigning or creating a new setting — making the upgrade simple for any jeweler or trade shop.
  • Die-struck and CNC machined: Precision manufacturing produces a shank that is stronger and more durable than a cast equivalent. It can be heated and soldered without damaging any components.
  • No key or pin required: The shank opens and closes without any external tool. A cover catch provides a guaranteed close with no tension mechanisms to loosen over time.
  • Guide wire security: A built-in guide wire bridges the gap when the shank is open, preventing the ring from falling off or flying open. Guaranteed to open 3 full sizes.
  • Individually replaceable components: Every part of the shank can be replaced independently, extending the working life of the ring without requiring a full shank replacement.
  • Trade-proven: Tested and trusted by over 5,000 retail jewelers and trade shops.

Specifications

Shank Diameter 3mm x 3mm
Construction Die-struck and CNC machined
Opening Range 3 finger sizes
Available Metals 14K Yellow Gold, 14K White Gold, 18K Yellow Gold, Platinum
Available Size Ranges Closed sizes 2–5½ and closed sizes 5–9

Available Options

Part # Metal Closed Size Range
70-17 14K Yellow Gold 2–5½
70-18 14K Yellow Gold 5–9
71-17 14K White Gold 2–5½
71-18 14K White Gold 5–9
7B-17 Platinum 2–5½
7B-18 Platinum 5–9
7C-17 18K Yellow Gold 2–5½
7C-18 18K Yellow Gold 5–9
California Prop 65 Warning California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.
Brand
Otto Frei
Part #
70-17
Type
Ring Shanks
Country of Origin
United States
Dimensions
0.15 in x 0.15 in x 0.25 in
Shank Diameter
3mm x 3mm
Construction
Die-struck and CNC machined
Opening Range
3 finger sizes
Available Metals
14K Yellow Gold, 14K White Gold, 18K Yellow Gold, Platinum
Available Size Ranges
Closed sizes 2–5½ and closed sizes 5–9