Clamp is the most important fitting for any type of gutter. The stronger the clamp, better the life of the gutter. Also clamping styles differ from type of roofs. There are three types of clamps. 1. uPVC clamp 2. GI clamp and 3. uPVC clamp with GI handle. GI clamp and uPVC clamp with GI handle can be used for welding to metal surfaces. uPVC clamp can be screwed to concrete flat surfaces. Slop must be provided when installing the clamps to enable flow. It locks the gutter inside the clip which prevents the edges from flipping out. Available in multiple colors to match your gutter color. Maximum spacing between two clamps should not exceed 1 meter.