These are Custom designed for Non-Sparking Tools For coupling and decoupling of loading and vapor lines to the LPG Bulk
Tank at the Loading Bay in an LPG Bottling Plant. Fix jaw Ribbed design has been developed to have maximum Engagement with the locking nut
and therefore prevent any slippage during coupling/decoupling. These are much safer than moving jaw pipe wrench / adjustable wrench, which was generally used earlier.