Do you rent or sell all boot crampons like Black Diamond Contact Strap Crampons or Grivel G-10 New-Classic?

They do sell and rent crampons. Not sure of the brands.

We rent a selection of Grivel and Stubai crampons to fit various boots, which we also rent. If you are using your own boots you must bring them with you at the time of renting. Gary

Thank you for reaching out Bill. We sell both Black Diamond, and Grivel brands. We do not carry the Contact Strap Crampon, but have comparable models by CAMP USA and Grivel. We carry the G-12 New-Classic by Grivel. We recommend stopping by the shop to view our wide variety of your potential options!