AUCH 5Sets Silver Color Stainless Steel Bow Shackle + 4-Hole Adjuster for Survival Bracelets Outdoor Rope Paracord Package include: 5Pcs O-shape shackle and 5Pcs 4-hole adjuster Screw Pin Length: 26mm The small hole of adjuster is 3/16" in diameter Dimensions(Bow shackle):31mm * 20mm Used for camping, hiking and other outdoor sports