What's shown in the pic above?
It's a saddle swap; only the bridge saddles were replaced, not the entire bridge. In this case non-metal saddles (graphite) were chosen.
Any effect to this swap?
Yes.
- Non-metal bridge saddles do not feature potential sharp edges so they don't cut the strings during tuning & breakages could be avoided
- Non-metal so they won't rust
- The screws in the non-metal saddles here are not protruding out so they won't jab the picking hand while playing
- Non-metal material manifests a mellower tone (makes perfect sense to counter those bright single coils) but unless you are monitoring this closely through headphones, you won't hear the real difference
Do you need a tech to do this?
No, if you have any experiences with a screwdriver at all, it's a DIY thing. However, you need to re-intonate your guitar thereafter.
How much, where & what are the brand names to look out for?
The saddles are sold in a set, so a set of 6 would be about $40/-, available at guitar stores offering replacement parts. I've had good experiences with Allparts/ Graphtech.

