![hilti anchors limestone hilti anchors limestone](https://res.cloudinary.com/engineering-com/image/upload/v1431392349/tips/IMG_20150511_205548_916_swjhqp.jpg)
You MUST use carbide tip bits to drill granite, dense basalt and other hard rocks. even when using a drill you still need a hammer to put in bolts.
![hilti anchors limestone hilti anchors limestone](https://5.imimg.com/data5/ZL/CZ/RC/SELLER-3815549/frame-anchor-hrd-c-500x500.jpeg)
#Hilti anchors limestone plus
![hilti anchors limestone hilti anchors limestone](https://s3.amazonaws.com/chaparralmaterialscomfiles/product/SM-hilti_XGN20_MX_nail.jpg)
You SHOULD use a Rotatory Hammer drill in order to drill granite, dense basalt and other hard rocks. In the Caving community everyone assumes that if someone placed a bolt it's because it was needed and nobody will ever chop out bolts placed by someone else just because they think they were unnecessary. However, in the rest of the Canyoning/Canyoneering world where canyons have running water bolting is considered the safest, least intrusive and most aesthetically appealing solution for technical routes. This is because most of the canyons in these regions DO NOT HAVE RUNNING WATER and solving anchor technical problems represents most of the thrill for these descents. In general, most of Utah/Arizona bolting is heavily criticized and bolts get routinely chopped off by locals that do not believe in bolting. Even the National Park Service is confused on this topic: while bolting is forbidden in Death Valley National Park, rangers themselves have bolted canyons in Arches National Park to protect the rock from rope abrasion. The Canyoneering community engaged a few years ago in the so called "Bolt wars" where individuals of both sides engaged in verbal attack onto each other. Bolting is like religion: some strongly believe in it, some strongly reject it.
![hilti anchors limestone hilti anchors limestone](https://francishaden.files.wordpress.com/2019/09/img_8072.jpg)
This article does not want to discuss if bolting is right or not.