6x Watch Strap Spring Bar Pins (Assorted 18mm, 20mm, 22mm) Double Flanged – Sold by Qinbihe FBA

Handy little repair pack on Amazon if you have a broken spring pin or youre swapping out watch straps. It covers the three most common lug widths in one multipack for £2.54.
Key Features:
Assorted Sizes: Includes 6 pins in total covering the 3 standard sizes (18mm, 20mm, and 22mm 2 of each).
Double-Flanged Ends: Ridged tips make them much easier to pop in and out using a standard spring bar tool, butter knife, or fingernail without slipping and scratching the watch lugs.
Universal Fit: Compatible with standard traditional mechanical/quartz watch cases, smartwatches (such as standard Samsung Galaxy Watch and Garmin models using conventional lugs), and replacement leather, rubber, or mesh bands.
Build: Stainless steel internal spring mechanism to keep tension secure in the lug holes.
Useful spare pack to keep in a drawer rather than paying a high-street jeweller £5 just to replace a 50p pin.