Upgrade your trailer's stopping power with this complete Electric Brake & Drum Kit for 3,500 lb trailer axles. Featuring a pair of 10" x 2-1/4" self-adjusting electric brake assemblies and 5-lug 4.5" bolt pattern hub drums, this kit delivers reliable braking performance in all weather and road conditions. Built from premium cast iron and treated with a protective coating, the drums offer superior resistance to rust and corrosion. The self-adjusting design reduces the need for manual maintenance while maintaining optimal brake shoe clearance over time. This set includes all essential components: inner/outer bearings, grease seals, dust caps, hub nuts, washers, cotter pins, and more—ensuring you have everything needed for a smooth and secure installation. Compatible with Dexter, AL-KO, Lippert, and other major brands, this kit fits most 3,500 lb axles with 1-3/8" x 1-1/16" spindles (tapered). Not compatible with straight 1-1/16" or 1" spindles. What's in the Box: 2 × Electric Brake Assemblies (10" x 2-1/4", Self-Adjusting, Left + Right) 2 × 5-Lug Brake Drums (4.5" Bolt Circle, 5 on 4.5 pattern) 2 × Inner Bearings (L68149, I.D: 1.377", O.D: 2.164") 2 × Outer Bearings (L44649, I.D: 1.062", O.D: 2.058") 2 × Grease Seals (I.D: 1.718", O.D: 2.56", Height: 0.5") 2 × Dust Caps (Mounting Diameter: 1.988") 4 × Rubber Plugs for Dust Caps 10 × Hub Nuts 8 × Mounting Nuts (7/16-20UNF) 8 × Spring Washers 2 × Castle Nuts (Slotted Nuts) 2 × Flat Washers 2 × Cotter Pins