There are eight types of percussion bits.
1, carbide impact drill can be divided into: straight shank impact drill, taper shank impact drill and hexagonal shank impact drill. Use: for clamping on the impact drill, for drilling concrete foundation, wall, brick wall, granite, in order to install expansion bolts, plastic expansion pipe and other fasteners in the hole. 2, if the electric hammer bit is accidentally broken in the inside, the first user should first open the electric hammer collet to the maximum, if there are screws in the collet, you can remove the screws with a screwdriver; Then insert the collet key and turn the collet counterclockwise. Note that the collet is rotated, not the key. If the key is rotated, the bit will clamp more tightly, so just rotate the collet counterclockwise. 3, the impact drill bit can not be taken off: put the impact drill upside down on the ground, press down the drill sleeve at the root of the drill bit with the left hand, hold the drill bit upward with the right hand, and rotate the drill bit around when lifting. Hand electric drill bit: Equipped with a key, you insert the key into the side hole of the drill sleeve and loosen it to remove the drill bit.