Sealey clamps sealey qbc300 a quick bar clamp from sealey has a heavy duty bar clamp and spreader fitted with textured tpr grip for improved ergonomics and suitable for one handed operation features quick change screw to switch between clamp and spreader functions full faced pads provide even distribution of pressure features a maximum clamping force of up to 150kg fitted with strengthened carbon steel bar minimizing bending sealey qbc300 quick bar clamp 300mm