A recently invented tool the V-Line clamp is used for snapping square or angled chalk lines on virtually any flat building material between 1/4 and 7/8" thick.
It eliminates the need to drive a nail or have a second person hold the end of the line.
It can also be used to hold the end of a tape measure for layout purposes.
Invented by a carpenter from central Kansas the V-Line clamp is gaining acceptance by many in the trade, young and old.
Constructed of plastic, making it durable, lightweight, and easy to use.
The clamp can be clipped on your tool belt when not in use, keeping it handy for the next time it is needed.
While framing a house an experienced carpenter sometimes has to get pretty creative when measuring, marking and snapping lines.
Although useful for the seasoned pro, this device can greatly increase the productivity of a novice as well.
Works with or without a chalk line clip and will not fray the end of the line.
Types of Building Material

1. Drywall
2. Oriented Strand Board, AKA as OSB, Wafer board, Smart ply, Sterling Board, and Exterior Board.
   
3. Celotex
4. Cement Board, the rounded edges are no problem.
   
5. 3/4" tongue and groove flooring
6. Fascia
7. Soffit
8. Siding
9. Dense Glass

Basic Carpentry Tools

1. Tool Pouch
2. Framing Hammer
3. Tape Measure
4. Carpenter Pencil
5. Speed Square
6. Chalk Line
7. Framing Square
8. Utility Knife
9. Nail Puller
10. Chisel

To be productive every carpenter needs a full set of good quality basic tools.
After testing this product an old dog was taught a new trick, in my opinion the V-line clamp should be included on that list.