TierraCast® 6.35mm micro washers with a 2.4mm hole. Made in the USA from stamped brass! The antiqued pewter plated finish gives these washers a dark, attractive look. These washers are perfect for adding extra security to leather designs! Use these washers with TierraCast's 4mm rivets and all 3 sizes of eyelets to embellish, reinforce or adjust thickness of your leather designs or other cold connections. TierraCast Safety Compliance Info.