Split Pins are Naturally Difficult to Pull Out Because They are Non-rotating. There was a Special tool to Pull Out such a Split Pin! | Webike Philippines News
Familymaid Split Pins Assorted Color 77 Piece 16976 | Zoro
Adjustable Length Split Pin Paper Bead Rollers Including Pin - Etsy
Wilde Tool 7" Inch Cotter Key Split Pin Extractor Made in USA
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Amazon.com: 50 x Split Cotter Pins Imperial 5/64" x 1" Bright Zinc Plated Retaining Fixings : Industrial & Scientific