9/16" opening (H/D Trucks). Fits control arm shaft mounting bolts up to 9/16" diameter, including 1/2 Ton - 1 Ton Chevrolet/GMC trucks, HD service. 50 per box.

• "CC" Style 9/16" opening for H/D Trucks
• Accepts bolts up to 9/16" diameter
• Shim thickness: 1/16"
• Comes in a pack of 50