Hammer is a kind of safety clutch electric rotary hammer with a pneumatic hammer drilling mechanism. Hammer is the use of compressed gas piston, impact drill bit, need not make much effort, can open 6--100mm in concrete, brick, stone and other hard materials on the hole hammer in the above-mentioned materials on the opening of high efficiency, but it is not a hole in the metal.
This is a thread, a spade drill insert, with tools to drill stuck, then put the head under the line, will see the thread head below two slots, with just 19 wrench clockwise, remove it. The other is with a circlip, and when the rubber sleeve is pulled out of the head, the circlip can be seen.
