Spectra Precision M401 Tilting Base Adaptor

Spectra Precision M401 Tilting Base Adapter – Formerly SECO 4852-11

The Spectra M401 Tilting Base Adapter is a heavy-duty, field-proven mounting solution designed for steep slope and grade work. Ideal for roadwork, drainage, foundation prep, and site leveling, this adjustable bracket allows you to manually tilt your laser and simulate grade—even when using a level-only rotary laser.

Originally known as SECO part #4852-11, the M401 is a go-to for contractors who need manual slope without investing in a slope-capable laser. With a precision tilt mechanism and rugged construction, this adapter delivers stable, repeatable performance in harsh outdoor conditions.

Spectra M401 Key Features:

• Compatible with most standard 5/8-11 tripod threads

• Precision tilt mechanism for fixed-angle setups

• Allows slope creation using level-only lasers

• Durable, field-grade metal housing for long-term use

• Smooth adjustment knobs for accurate angle control

Whether you’re working with the Spectra LL100N, LL300N, LL1505, or similar lasers, the M401 tilting base adds essential flexibility to your setup at a fraction of the cost of a full slope laser.