46 degrees. Also the A wedge is 51 and the sand wedge is 55.
An approach wedge is basically a gap wedge (50 or 52 degrees of loft depending on model) This wedge is used when you are at a yardage which is between your pitching and sand wedge. You can also use this club for pitching, chipping and bunker play.
The slingshot sandwedge has 54 degrees of loft.
The main difference is loft a pitching wedge has about 46-48 degrees of loft and a sandwedge has about 54-56 degrees of loft. The pitching wedge therefore can be hit farther.
The standard wedge has a 46° loft. The "Grass-N-Sand" variant has a 50° loft.
The Loft. The approach wedge "A" is lofted between the pitching wedge "P" and the sand wedge "S"
A lob wedge is a golf club with a loft of about 58- 64 degrees. Some people call it a highly lofted sand wedge.
I carry a Lob wedge in my bag and it is a 60 degree loft club. It is one of 4 wedges that I carry. The others are a Pitching wedge which is 45 degree, a Gap wedge which is 51 degree, and a Sand wedge which is 56 degree.