[W1  & 2]

[W3  & 8]

After the anchor embedded in temporary construction is unnecessary, leaving it as is, it may cause rust from rain water intrusion and deterioration and cracking of concrete. To prevent it, simply pull out the anchor with a tool that pulls it out easily with an electric screwdriver. [Features] Comes with a magnet at the tip. Remove the cone that remains in the bottom hole after pulling out the anchor (stainless steel cones cannot be used). If the shank is attached to the spanner after use, the anchor and bit will not come apart after use, you can simply hang the spanner to the shaft and turn it with a plier.