Difficulty level (1 easiest 6 Hardest):3  
A puzzle lock by Boaz Feldman

B-Lock is a two stages puzzle. When you first examine the lock, you'll notice that you can't actually insert the key into the keyhole... It's BLOCKED! To unlock it, you'll really need to think outside the box. The specific trick of this lock puzzle is like nothing you've seen before. A Eureka moment is promised for the solver.
B-Lock - A lock puzzle, brain teaser for adults, gift for dad, trick lock, gift for engineers, birthday gift.  .
B-Lock is made of brass and stainless steel, based on a standard lock.

The story of Puzzle-Lock begins in Israel in the 1990s, with the passion of puzzle enthusiast, collector, and expert Dan Feldman, who began converting locks into puzzles. His experiments led him to develop the Dan-Lock, considered by many to be the best puzzle lock in the world.
Over the years, Boaz, his son, began inventing his own locks – and thanks to his creativity, ingenuity, and innovation – he founded Puzzle-Lock, specializing in unique and challenging puzzle locks. Puzzle-Lock offers a variety of puzzle locks in different levels of difficulty – suitable for everyone.
The locks are handmade and individually tested to ensure uncompromising quality and maximum enjoyment.