Titen HD Zinc Plated

We have tested this specific concrete screw in many break tests and we found it to be good if your rock isn't too hard (damages screw and can't get it in) and good if your rock isn't too bad (somewhere a glue in would be better).  These are easy to remove and therefore used more often as temporary anchors than permanent ones which is why we have zinc plated steel options.  If you plan on using these as a permanent anchor, please use the 304 Stainless or the 316 Stainless bolts that we also stock.    The bolt size is the hole size you need.  However with 1/4" bolts, you need 8mm hangers.  3/8" bolts can be used in 3/8" or 1/2" hangers.  1/2" bolts do NOT fit in 1/2" hangers without drilling the hole to 9/16.