Doublecross by Eureka or 3 piece cross puzzle, unboxing and solution. - YouTube
3-in-One Wooden Puzzle Games Set - 3D Puzzles for Teens and Adults - Includes Wood Interlocking Blocks, Diagonal Burr, and Snake Cube in Storage Box by ShalinIndia - Walmart.com
3d Cross Wooden Brain Teasers Puzzle - Puzzles - AliExpress