The Edelrid HMS Bulletproof Belay FG Carabiner is a highly robust belay carabiner with a proven steel insert from the Edelrid Bulletproof series. The integrated spring bar reliably prevents the carabiner from twisting in the tie-in loop to limit the risk of cross-loading. In addition, the bar can only be opened if pressed from above, preventing the tie-in loop from accidentally changing position.