Craftsman Stud Finder 3/4" Depth Edge Detection
This stud finder can penetrate drywall to a depth of 3/4 inches and works on wallpaper and fabric surfaces as well. It has a shock-resistant & water-resistant body for durability and long life. The price drops from $12 to $9.98. Shipping is free for prime members or nonmembers get free shipping over $25.