Product Description Large Jaw Lock 250mm. ● This is an aid for collecting Dorcus titanus and Prosopocoilus inclinatus using a scraping rod during sap collection or cave collection. ◉ Also, when scraping out from behind the bark of high-altitude tree cavities, by hooking the jaw lock before scraping, you can prevent losing sight of the stag beetle even if it falls from the tree! We recommend using it to reliably collect large Dorcus titanus and Prosopocoilus inclinatus!! ● Hook the ring onto the back of the inner tooth of the stag beetle's large jaw, pull the string with the bead, and secure the large jaw. ★ This is only an auxiliary tool for the scraping rod, so do not collect using the jaw lock alone. ※ If you try to take out the stag beetle from the tree cavity using only the jaw lock and shake or pull it, you may damage the stag beetle's large jaw or break its legs. In the worst case, the large jaw may break. This is only an auxiliary tool to prevent the stag beetle from escaping into the depths of the tree cavity and to collect it with a scraping rod. ● Use it when you can't get the stag beetle out of the cave with just a scraping rod as shown in the photo. Locking the large jaw prevents it from escaping into the depths of the tree cavity!! ○ Brass pipe, cotton thread ⚪︎ ★ After collecting the stag beetle by locking the large jaw, when loosening the lock, first slide the push lock under the rubber cap to loosen the ring at the tip. ★ When collecting, pull out the tip of the ring about 2cm with your nail. We were able to make it cheaper by simplifying the construction, so please consider it.