Suggested Retail:$20. ZIRCON StudSensor HD55 Stud Finder. The StudSensor HD55 deep-scanning stud finder features an enhanced LCD display, with Target Spotlight, that illuminates on-screen when you’ve found the edge of a stud. Select from 2 stud scan modes to find the edges of wood and metal studs to securely anchor mirrors, shelves, and cabinets to the wall while also avoiding live AC electrical wiring.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. PAID DELIVERY AND 7 DAY ALTERNATE PICK-UP ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.