Full contact, precisely tapered

To change the angle of a bolt-on neck, players and repair shops have used shims for years. We've seen everything from matchbook covers to guitar picks stuck in neck joints.

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Full contact, precisely tapered

To change the angle of a bolt-on neck, players and repair shops have used shims for years. We've seen everything from matchbook covers to guitar picks stuck in neck joints.

Those kinds of shims create an unwanted gap under the heel of the neck: a dead air space where humidity condenses to swell the wood. As Dan Erlewine describes in his Guitar Player Repair Guide:

"This gap may cause an upward kink in the neck. And many players feel they lose tone unless firm contact is maintained between the neck and the body."

Dan creates tapered shims that cover the entire heel of the neck. With these Bolt-On Shims, that work is done for you. Attention repair shops: Making a quality shim takes time. Keep these on hand for a quick turnaround on this common repair.

These shaped shims fit most neck pockets with a rounded heel. You can trim along the lasered line to fit the shim to a pocket with a flat heel, like a Tele.

This set includes 3 hard maple shims, each at a different taper for changing the pitch of any bolt-on neck:

  • 0.25-degree shim offers the most versatility – stacking them will let you really dial in the neck angle you're after.
  • 0.5-degree taper is the one you'll reach for most often – it works great on Fender and many other solidbody guitars.
  • 1-degree taper for guitars with a Tune-o-matic bridge or Floyd Rose.

Dimensions: 2-3/16" x 3" (55.56mm x 76.12mm)

Taper specs (approximate):

0.25-degree tapers from 0.030" to 0.019" (0.76mm to .048mm)

0.5-degree tapers from 0.028" to 0.008" (0.71mm to .020mm)

1-degree tapers from 0.060" to 0.010" (1.52mm to .025mm)



  • SET OF 3 PRECISION SHIMS: Includes 0.25°, 0.50°, and 1.00° shims to achieve the perfect neck angle for any bolt-on guitar
  • PROFESSIONAL NECK ANGLE ADJUSTMENTS: Tapered maple shims provide full contact for a solid neck-to-body connection
  • IMPROVES PLAYABILITY & TONE: Eliminates air gaps under the neck heel, preventing humidity issues and ensuring better sustain
  • PRECISION TAPERED DESIGN: Machined for consistent thickness and optimal angle adjustments
  • SHIM DIMENSIONS: Shaped shims measure 2-3/16" x 3" (55.56mm x 76.12mm) to fit most guitar neck pockets
  • SET OF 3 PRECISION SHIMS: Includes 0.25°, 0.50°, and 1.00° shims to achieve the perfect neck angle for any bolt-on guitar
  • PROFESSIONAL NECK ANGLE ADJUSTMENTS: Tapered maple shims provide full contact for a solid neck-to-body connection
  • IMPROVES PLAYABILITY & TONE: Eliminates air gaps under the neck heel, preventing humidity issues and ensuring better sustain
  • PRECISION TAPERED DESIGN: Machined for consistent thickness and optimal angle adjustments
  • SHIM DIMENSIONS: Shaped shims measure 2-3/16" x 3" (55.56mm x 76.12mm) to fit most guitar neck pockets

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