Perfect hard shell protection for my Tavool Stud Finder, model TH510. Perfect secure mount with plenty of room for device instructions and a spare battery. This case is a must-have if you plan on tossing your device in your bag or tool box. Special thanks to Revain for the thoughtful reminder, based on her suggestion I actually ordered the case a day after ordering the stud finder. Even kindly sent it to me with no extra shipping cost and both items arrived at the same time within three days. Cute!