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V-Groove + Top-Read Vial
V-grooved bottom edge reads true on round stock; top-read vial gives an at-a-glance reading from above when the bottom edge is wedged into the work.
Oversized Vial Port
Vial window sized for clean readability across the layout. Screwed-tight covers lock the vials in place so they hold position after the corner drop.
Heavy-Duty Rubber End Caps
Rubber end caps absorb the corner drop so the read holds. Same impact-survival behavior the trades expect from a job-site level.
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SKU IBL240
I-Beam Levels
Available at trusted retailers nationwide
Direct pricing coming soon. See retailer availability below.
The IBL Level is the go-to I-Beam in the Swanson line. Aluminum I-shape extrusion with oversized vial windows locked in place by machined screws, top-read vial for at-a-glance reading from any angle, and a V-grooved bottom edge for level reads on round stock. Rubber end caps absorb the corner drop so the read holds true.
Size
24"
IBL240
Pick up locally or order online from Amazon, Home Depot, Lowe’s, Walmart, Ace, Menards, or Acme Tools.
Family-owned
Same factory since 1925
Trusted retailers
Available nationwide
Pro-trusted
32,000+ verified reviews
In stock at retailers
Why pros reach for it
01
V-grooved bottom edge reads true on round stock; top-read vial gives an at-a-glance reading from above when the bottom edge is wedged into the work.
02
Vial window sized for clean readability across the layout. Screwed-tight covers lock the vials in place so they hold position after the corner drop.
03
Rubber end caps absorb the corner drop so the read holds. Same impact-survival behavior the trades expect from a job-site level.
A closer look

Two-foot reach for cabinet runs, window trim, and finish work. The legacy go-to I-Beam in the Swanson line.

Rubber end caps absorb the corner drop. Body stays straight; the read holds true.

V-grooved bottom edge sits true on round stock. Top-read vial gives an at-a-glance read when the level is wedged in.