I’m always looking for faster techniques or tools to speed things up and found the V-Line clamp by accident. It is designed to speed up snapping lines on sheathing. I carry one in my pouch and use it to secure the end of my chalk line while snapping cuts – especially the angled ones for hip, valley, and gable sheathing. You can see a demonstration of it in the player below. The video is hokey, but the tool itself is good. Cost: $10