SWISS REIMAGINED Stainless Steel Spring Bar Pins for Attaching Watch Band to Watches or Buckle (Set of Two) - 1.8mm Diameter PREMIUM SPRING BARS FOR ATTACHING WATCH BAND WITH YOUR CASE OR BUCKLE - the Spring Bar Body is Manufactured from 316L Stainless Steel and the Spring is Manufactured in Tempered 304 Stainless Steel EXACT AND SECURED FIT - These Spring Bars are 1.8mm in Diameter at Their Widest Point and Designed to Fit a Watch or Buckle Where the Measurement Between the Band Attachment Lugs is 20mm - This Will Ensure Sufficient Tension In The Spring To Hold Your Watch Band to Your Watch Securely ATTACH/DETACH WITH EASE - The Spring Loaded Ends are Double Flanged for Easy Installation or Removal, this Process will be a Breeze with a Spring Bar Jewelers Tool by SWISS REIMAGINED (ASIN:B00DMUOMEU) PRECISE MEASRUEMENTS - The Pin Ends are 0.8mm in Diameter and Provided They are Installed Correctly Will be Locked In Place Between the Watch Lugs or Buckle Lugs with Approximately 4.4 Newtons or 1 Pound of Force Through the Tension in The Spring VARIOUS SIZES TO CHOOSE FROM - SWISS REIMAGINED Spring Bars are Available in sizes to Fit Lug Sizes From 10mm to 26mm in Both 1.8mm and 1.5mm Body Diameter. Not Sure of the Size You Need - The Lug Measurement Tool by SWISS REIMAGINED (ASIN:B00RT0D32Q) Will Provide The Answer