Dive Rite 30' or 100' Stainless Steel Finger Spool with Double Ended Snap Bolt for Scuba Diving Dive Rite 30' or 100' Stainless Steel Finger Spool with Double Ended Snap Bolt Crafted of 16 gauge 304L stainless steel for durability in marine-grade environments TIG welded and then electro-polished Compact with a narrow footprint as compared to similar plastic spools