This Slackline Shackle is made of stainless steel to last a lifetime. No problems at all to use near water, in snow, in the rain or at the beach. The stainless steel shackles with 316 grade are available from M10 (45kN), M12 (60kN) or M16 (100kN). See measurements below.
Bow Shackle M10: 210grams
Bow Shackle M12: 300grams (This Shackle Size will fit any 25mm webbing and also the reduced sewn eye of a 50mm webbing sling)
Bow Shackle M16: 380grams
The M12 Slackline Bow Shackle has a mouth opening of 24mm but the is no problem to put the 25mm webbing in it. We recommend to go for the M12 for 25mm slackline webbing and also for the Slacklineshop Ratchet with the short sling.