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Blue aluminum box-beam level 48 inches with magnetic strip and three acrylic vials

Westward

Westward 4MRV6 Magnetic Box Beam Level 48 In 0.001 Accuracy

SKU CH-WKK4-K8C3X MPN 4MRV6

A 48-inch magnetic box-beam level with three acrylic vials and 0.001 accuracy for precise alignment

  • Total length48 in (122 cm)
  • Product typeLevel Gauges
  • Precise 0.001 in accuracy for exact alignment
  • 48 in length covers long spans efficiently
  • Magnetic strip holds level to ferrous surfaces
  • Three acrylic vials show level and plumb clearly
  • Aluminum frame resists jobsite wear and corrosion

Magnetic box-beam level, 48 in

This Westward 4MRV6 is a magnetic box-beam level designed for trade professionals who need reliable horizontal and vertical alignment on ferrous surfaces. Its 48 in overall length suits layout work on walls, studs and pipe runs where a long reference edge is required.

Build integration and workflow

The single strip magnet holds the level to steel framing, beam flanges or ductwork, freeing both hands for marking or fastening without a helper. Three acrylic barrel vials — one level and two plumb — give immediate reading in the orientations most common on site, and the aluminum frame resists jobsite abuse while remaining light enough for overhead use.

Accuracy, handling and durability

Stated accuracy is .001 in standard measurement, providing the precision expected for finish carpentry and mechanical installation. The blue frame improves visibility in dim conditions, and the acrylic vials resist fogging and impact better than glass alternatives. No illumination or top-read window is fitted, so the tool relies on ambient light for vial reading.

How it compares

Measured against everything we stock in Utility & Specialty Hand Tools, at today’s prices. Recalculated every night.

Price $40.99
Pricier than about 68% of the 2,474 comparable items (median $23.99).

Specifications

Product
Brand nameWestward
Model name4MRV6
Product typeLevel Gauges
Size & build
Total length48 in (122 cm)

Questions about this item

How does the 0.001 accuracy hold up when the level is used continuously on a job site?

The 0.001 accuracy is a manufactured specification for the acrylic barrel vials; sustained use does not change this tolerance unless the vials or aluminum frame are damaged.

Does the magnetic strip or the aluminum frame create noticeable heat or noise during all-day use?

The level has no moving parts or electronics, so it produces no noise and generates no heat during extended use.

What type of surface must I already have for the single magnetic strip to hold the 48-inch level securely?

The magnetic strip requires a ferromagnetic metal surface such as steel beams, studs, or plates to hold the level in place.

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