Libra One New 10" X 2-1/4" Trailer Brake Drum Kit 5 on 4.5" B.C. for 3500 Lbs Axle - 22001 One New 10" x 2-1/4" trailer brake drum kit 5 on 4.5" bolt circle for Dexter and other brands 3,500 lbs trailer axle Bolt pattern: 5 on 4.5", 2 x bearing races and 5 x 1/2"-20 studs installed Kits also includ: L68149 inner cone bearing and L44649 outer cone bearing, Grease seal 1.719" x 2.565", E Z lube grease cap with rubber plug; 5 cone wheel nuts 1/2"-20 thread fits 10"x2-1/4" electric or hydraulic brakes (not included) Ref part #. 008-247-05, 84546