M6erfan,
I've been using these Ko-ken ones for like 10 years and I've never punctured a hose. I got these because they don't come to sharp point. The picture is from when they were new:
<a data-flickr-embed="true" href="https://www.flickr.com/photos/ccassan/3217114516/in/photolist-RpGYab-QexUHK-FJ9R5i-ENUoMx-Hcgc7s-Gqg3AR-ei5nuZ-RpDGw3-RpDGtN-QTQvZ3-QbJSYj-QTQvWh-QTQvUy-RpGY8N-ReSJHh-ENHkiw-Fzjm1k-FzYBnJ-FChR7P-FChRgg-FFRZ1q-Fj3rkW-FzYBdA-FJ9QFx-Fj3riG-FChQW8-FzYB9s-FFRYKW-Fj3raA-RpDGqb-RtcXma-eib3m9-ei5kyg-eib1Cd-eiaTih-eiaWWo-ei5ffn-ei5bvK-FzYBKs-ENUoV8-5Y4dvs-5XYY2Z-5XYXnB-5Y4eh9-5Udccv-5Ud8Gr-5Uhwso-5UdaCK-5Udaa2-5Uhy4E" title="DSC_3061"><img src="https://farm4.staticflickr.com/3421/3217114516_baf2ba8593_b.jpg" width="1024" height="681" alt="DSC_3061"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
Another reason why I got them was because of the grip handle. At the time I was really impressed with the level of grip this type of handle offered, even when wet with slippery coolant.
<a data-flickr-embed="true" href="https://www.flickr.com/photos/ccassan/3216263879/in/photolist-RpGYab-QexUHK-FJ9R5i-ENUoMx-Hcgc7s-Gqg3AR-ei5nuZ-RpDGw3-RpDGtN-QTQvZ3-QbJSYj-QTQvWh-QTQvUy-RpGY8N-ReSJHh-ENHkiw-Fzjm1k-FzYBnJ-FChR7P-FChRgg-FFRZ1q-Fj3rkW-FzYBdA-FJ9QFx-Fj3riG-FChQW8-FzYB9s-FFRYKW-Fj3raA-RpDGqb-RtcXma-eib3m9-ei5kyg-eib1Cd-eiaTih-eiaWWo-ei5ffn-ei5bvK-FzYBKs-ENUoV8-5Y4dvs-5XYY2Z-5XYXnB-5Y4eh9-5Udccv-5Ud8Gr-5Uhwso-5UdaCK-5Udaa2-5Uhy4E/" title="DSC_3064"><img src="https://farm4.staticflickr.com/3264/3216263879_acaf6e35d7_b.jpg" width="1024" height="681" alt="DSC_3064"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
I've found them useful for things other than its intended purpose, too.
I haven't seen the Snap-on ones in person, but to me it seems like it would be tricky to manouver the flat-tip blade around a round hose that's tightly bound to a neck. The flat-tip would seem to create more resistance than a conventional conical shaped tip.