The 100mm x 100mm powapost fencing drive in spike is designed to offer a strong anchor for timber posts this fence post spike is suitable for more ground conditions and can be easily installed using a powapost driving tool this spike has four dins so will not twist when inserted and also provides a secure post anchor installing a post with a fencing spike helps reduce the amount of time needed because there is no need for digging this fencing spike also prevents the need for concrete saving