Beehive coke ovens were called that because they were built in a beehive-like hemispherical shape, and then covered with earth. Cross section of a Hand-drawn Beehive Coke Oven. The Beehive Ovens were built in banks of ovens, called a battery, with a strong retaining wall in front, and then covered with earth.
One such technique is called âbumping.â Lock bumping, also referred to as key bumping is an attack technique using specially cut keys, known as bump keys, that can defeat conventional pin and tumbler door locks.
How to Make a Bump Key. Using these values, you'll make your first cut using the first value (key shoulder to first cut), then each subsequent cut will be spaced at equal intervals using the second value (distance between centers). As a general rule, you cut to the indented line on the blank key.