A Thunderbolt is self tapping and suitable for concrete, stone, brick, marble, wood and block (solid or hollow). Safe anchorage achieved without the need of high tightening forces. I can be removed and re-fixed into the same hole, providing the thread is correctly aligned. No expansion forces means close to the edge fixing and reduced centre spacing distances. Hex head
An easy way of fixing timber to walls or concrete.
M8 x 100mm
M10 x 150mm