You’ll never again have to resort to “hammer and chisel” methods that waste time and effort. Flange spreaders should be used in pairs to provide even spreading force.
Standard 60° wedge is suitable for most flanges; 30° “thin” and 60° “blunt” wedges are optional.
The HFS3A is designed for applications where total thickness of flanges and max. spread gap is 3" or less and flange bolts are a min. of 11/16" dia.
Use HFS6A if total thickness of flanges and max. spread gap is 6" or less, and flange bolts are a min. of 13/16" dia.