Paper Clips vs. Prong Paper Fasteners
Comparing 2 standards across 11 specifications. 11 key differences identified.
The Gem Paper Clip (introduced by The Gem Manufacturing Company in the 1890s) is a single looped piece of galvanized spring-steel wire that binds loose sheets using torsional elastic deflection. Available in standard No. 1 (33 mm / 1.3 in) and Jumbo (50 mm / 2.0 in) sizes, alongside specialized Butterfly/Trefoil wire clamps for thick 50-sheet reports.
Two-Prong Metal Paper Fasteners (standardized with a 2.75-inch / 69.85 mm center-to-center prong spacing) are heavy-gauge tin-plated steel compressors used with self-adhesive prong bases inside classification folders, legal case files, and medical patient charts to secure up to 500 hole-punched sheets.
Specification Comparison Table
11 Parameters| Parameter / Spec | ||
|---|---|---|
|
Standard No. 1 Gem Clip
|
33 mm (1.30 in) length — capacity 10 to 15 sheets (0.8 mm to 0.9 mm wire) | — |
|
No. 2 Gem Clip
|
28 mm (1.10 in) length — capacity 5 to 10 sheets | — |
|
Jumbo Gem Clip
|
50 mm (2.00 in) length — capacity 20 to 35 sheets (1.0 mm to 1.2 mm wire) | — |
|
Butterfly / Trefoil Clip
|
Large circular loops (up to 50 sheets without fiber indentation) | — |
|
Surface Finishes
|
Smooth zinc galvanized, vinyl color-coated, serrated 'non-skid' grooves | — |
|
Elastic Limit Physics
|
Operates strictly in the steel's elastic zone without permanent plastic deformation | — |
|
Center-to-Center Prong Spacing
|
— | 2.75 in (69.85 mm standard) |
|
Standard Prong Capacities
|
— | 1.0 in (approx. 200 sheets) or 2.0 in (approx. 400 to 500 sheets) |
|
Compressor Bar Function
|
— | Slotted steel slide bar locks over prongs and folds prongs flat under tension |
|
Mounting Styles
|
— | Factory heat-bonded to pressboard folder or peel-and-stick self-adhesive base |
|
Primary Applications
|
— | Legal court exhibits, hospital medical records, mortgage closing packets, human resources personnel files |