Overview Reviews Product Description Used for the installation of 40 MM AC/C Spirafix Ground Anchors - I'ts hollow barrel allows for the anchor to be struck around the collar of the anchor rather than the head which means both the domed nut and internal threads do not get damaged during installation. This product can also be used in conjunction will Hollow barrel post drivers as is seen on the link. Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Spirafix SA492 - 40mm Manual Hammer Cap Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *