From the Manufacturer
Safely attach crib mobiles with the easy-to-use Crib Mobile Attachment Clamp. The Crib Mobile Attachment Clamp features large rubber pads that grip the crib railing and protect your crib from scratches and damage left by post-and-knob style arms. Use the clamp as a replacement for post-and-knob styles that don’t fit all cribs. The crib mobile attachment clamp fits onto both traditional and convertible cribs, including Baby’s Dream and specialty and decorativ