Titan Fitness Pair Adjustable Chrome 14" Thread Dumbbell Handle w/Lock Collars Quality Design: Chrome finish, knurled handle, rubber O-ring inside star collars Capacity: Each side holds up to 4 plates with 1" holes to 1" wide Durable: Heavy-duty steel and durable rubber O-ring Safe: Chrome finish won't flake off, knurled handle prevents slipping, collars stay tight Compatible: Will hold most plates with 1" hole