there's really no different between the grivel, petzl or new BD's - they all work really well. the older BD's (with black hangers) have smaller teeth & are harder to start. whatever you get, make them all the same type, they rack easier, mix brands & they don't sit together so well. I have petzl screws & like them. A range of sizes is good, climbing ice in Canada I have 1 long & 1 stubbie, & then 1/2 17cm & 1/2 13cm. works for pure ice routes for me, the ice here is good so 13cm screws are usually enough. |