The only US made shackle on the market today! This is an accessory style shackle kit that uses hardened bolts that are pressed into a heavy steel end plate. Kit uses steel bushings as original and comes with modern grease fittings installed. Bushings must be reamed after they have been pressed into the perch and leaf spring. We offer A-5303-D drill bit to bore bushings or A-5303-R which is a reamer. For the REAR leaf spring.