A similar - but less expensive - alternative to the 525 is the mini-Bone Collector 15030 - even in walnut scales as -2 ($140 vs $170 MSRP). Easier on the pockets - and in D2 vs 154CM. Of course, if you like the big 520, look at the 581 - neat handles - and M390 steel ($220 vs $185). I have all four - the mini-BC, #15030-2, gets a lot of pocket time. That 581 does, too - and would see more, if it just was a manual opener like the others (It's assisted.).
Stainz