To change the angle of a bolt-on neck, players and repair shops have been using shims for years. We've seen it all—from matchbooks stuffed into the neck pocket to pieces of credit cards.
These types of shims create an unwanted gap under the neck heel—a dead air space where moisture can accumulate and cause the wood to swell.
Lux Guitars creates 3D-printed tapered shims that cover the entire neck heel. With these ready-to-use shims, you’ll get the playing comfort you’ve been dreaming of.
Lux Guitars shims fit most neck pockets with a rounded heel. If needed, you can trim or cut them with scissors for a perfect fit.
 
what should i chose?
 The 0.25° shim helps regain some adjustment range. It's recommended when the instrument is playable, but the saddles are maxed out, preventing proper setup.
  
The 0.5° shim should correct the action on most guitars and basses. It's advised when only a moderate adjustment is needed.
  
The 1° shim is recommended for significant corrections, especially for "Tune-O-Matic" style bridges, as shown in the installation video.
Note: After installing a shim, you may need to readjust the saddle height.