What is the difference between SF1, SF3 and SF4 .25 inch staples?

I had the same question and just found the answer on Swingline's website. SF1 are standard staples in a "full strip," i.e., 210 staples per strip. A full strip is about 4 inches (10.16 cm) long. "Standard" staples means they're made of Swingline's standard quality of metal wire.SF4 are also full-strip staples, exactly the same size as SF1, but are "premium" because they're made of a stronger wire (specifically, with greater tensile strength), which Swingline says results in 75% fewer misformed staples.SF3 are exactly the same as SF4, except they are "half strip" staples, i.e., 105 staples per strip. A half strip is about 2 inches (5 cm) long. There's no difference between any of the dimensions of the individual staples. They all have a .25-inch "leg," which means they can hold about 20 to 25 pages, depending on the type of paper.The Swingline FAQ is at http://www.swingline.com/swingline/us/us/s/3227/stapler-staples-faq.aspx

can be used in a swing line tot 50 stapler

Thank you for your interest in our Swingline Premium Staples. For the Tot staplers we recommend our Swingline standard staples. https://www.amazon.com/dp/B002VL79WS

do these work for a swingline 99?

Thank you for your interest in Swingline staples, these should fit your Swingline 99 model.

I have a swingline cub stapler, circa 1961. it requires, "cub staples" or "77" staples. will any of your staples fit?

Thank you for your interest in Swingline stapling. You can use Swingline Standard Staples or Swingline S.F.3 Premium Staples which can be found here: https://www.amazon.com/Swingline-SWI79350-Standard-Staples-Silver/dp/B000HHI5ZI

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Staples, S.F. 3, Premium for Desktop Staplers, 1/4" Length, 105/Strip, 5000/Box, Jam Free, Half Strip (35440)

Staples, S.F. 3, Premium for Desktop Staplers, 1/4" Length, 105/Strip, 5000/Box, Jam Free, Half Strip (35440)

Product ID: 4217649

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Details

Brand
Swingline
Size
5000/Box
Item Weight
0.4 Pounds
Color
Silver
Number of Pieces
5000

📄Secures up to 25 sheets

🔩135,000 PSI premium wire strength

⚙️75% fewer jams with chisel point

Description

📎 Staple smarter, not harder — never miss a beat in your workflow!

HIGH CAPACITY HOLD - Effortlessly secures up to 25 sheets, perfect for all your professional documents and projects.
JAM FREE PRECISION - Sharp chisel points engineered to pierce cleanly, reducing frustrating staple jams by 75%.
UNMATCHED DURABILITY - Crafted from premium 135,000 PSI wire for superior tensile strength and reliability.
BULK SUPPLY BULK POWER - 5,000 staples per box with 105 staples per strip—stay stocked and productive without interruption.
UNIVERSAL COMPATIBILITY - Designed for compact desktop staplers but fits most standard models for versatile use.

Swingline’s Premium S.F. 3 Staples deliver professional-grade performance with 135,000 PSI wire strength and precision chisel points that reduce jams by 75%. Each staple secures up to 25 sheets, and the bulk 5,000-count box ensures you stay stocked for all your office needs. Compatible with most standard and compact staplers, these staples are the reliable choice for seamless productivity.

Specifications

Manufacturer	Swingline
Brand	Swingline
Item Weight	6.4 ounces
Product Dimensions	4.3 x 1.8 x 1.3 inches
Item model number	S7035440
Is Discontinued By Manufacturer	No
Color	Silver
Shape	U-Shape
Material Type	Metal
Number of Items	1
Size	5000/Box
Fastener Type	staple
Manufacturer Part Number	S7035440

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