Wear safety glasses or goggles, or a face shield with safety glasses or goggles.Work holding requirements for the job should be matched with the following clamp features to select the proper clamp style and size: strength and weight (eg: consider the size and nominal clamping pressure), opening (length of reach), throat depth (depth of reach), and ease of adjustment & clamping surfaces (materials used and size).Dispose off clamps with bent frames and replace bent spindles, if possible.Ensure that the pressure plate and anvil parts of the clamp are in full contact with the workpiece before tightening.Remove clamps as soon as the job is finished.