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If you can find one of these, they are incredibly useful when stripping most standard Mauser bolts. Designed and manufactured by the Argentine military, they turn up on eBay now and then.
Whats it for? The Mauser bolt strips down in the field with no tools required. All you need is a block of wood or the take down disk on the rifle stock. (I don't use the disk on the rifle for fear of marring it)
That step by step on SurplusRifle seems like just the thing. I'll be reviewing it later tonight with the bolt in front of me. Seems a lot better than some other instructions I have had.