This tool is essentially a pin vise that comes with the right attachments to use with watches.  It comes with replacement bars in case you break yours.  I'm not sure I would ever actually break one but it is nice to have them.  One side of the pin vise has a cross setup so you could put small drills in it, the other is designed for flat bladed items.  The cross side takes the screw driver tools, the flat side takes the spring bar catch.  Both work extremely well.  The screw driver tool has a flat blade on one side and a small round side on the other for pushing pins out.

I have a dozen or so watches and figured that rather than playing around with my pocket knife to remove the spring bars, I would get this tool.  I am very happy with how well it works.  The tiny spring bars have a little catch ring on them that this tool easily pushes against and boom, they are out.  Do be careful as they come out under a little spring pressure and can shoot off and easily be lost!  Amazon also sells a nice assortment pack of spares.&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/100-Spring-Bars-Watch-Pin-Band-Replacement-Part-8-19mm/dp/B000OVJY7A/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">100 Spring Bars Watch Pin Band Replacement Part 8-19mm</a>

A bonus is the nice little storage jar that comes with the extra tool pieces in it.  It has a twist top that opens like a salt/pepper shaker to allow you to "pour" out the tool you need.  It keeps me from needing to fumble around if you drop one.  I just leave the 2 in the tool at all times which makes it really simple, I won't be changing mine unless I break one.

5 stars, working great, happy to have it and making life easier as I manage my watches.