Siding Combo Tool, Is 2 Tools In 1, Providing Contractors Great Value & Saving Time On The Job, Combo Tool Punches Both The Nail Hole Slot & A Snap Lock In Vinyl Siding, Punches Or Enlarges Nail Hole Slot As Needed, Punches Snap Lock Punch To Secure Siding To Finishing Trim, Raised Tab Is Used In Cut Edge Of Siding At Top Of Wall Or Below Window To Secure Siding.