This Clarke spreader clamp can be used as a spreader or compression clamp by a simple head reversal.
Clarke CHT853 6" Spreader Clamp
Clarke CHT854 12" Spreader Clamp
Clarke CHT855 18" Spreader Clamp
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Clarke CHT136 36" T-Bar Sash Clamp Set
Clarke CHT742 36 Piece Precision Tool Set