With this Spit hit M 6X40 hammer-in plug set, you complete fast serial installations with ease. Whether you are fixing skirting boards, battens, or cable trunking into brick, concrete, or aerated concrete, you simply drive the pre-assembled screw nail home with a hammer using through-fix mounting. The plastic plug expands only once fully inserted, preventing premature expansion. The integrated collar provides a flush finish and prevents the anchor from slipping too deep into the 6 mm drill hole. If you need to make adjustments, the screw thread allows for easy removal. With 600 hammer-in plugs and 3 matching drill bits in a sturdy case, you are ready for any job.