Heavy Duty Bar Clamp, 150mm - Draper Expert 18928, This heavy-duty bar clamp is made from strong and durable engineering grade plastic.Capable of evenly distributing up to 306kg of sustained clamping force.The robust I-Beam structure and C45 rail reduces unwanted bending.The TPU protective cushions safeguard the workpiece from marking and damage.One-handed operation is easy, thanks to the quick release trigger.There is also a quick change button to convert the clamp to a spreader.They are designed with long handles to enable better leverage for reaching higher pressure easily. Draper Expert 18928 Heavy Duty Bar Clamp, 150mm