SelectTech 552 Adjustable Dumbbells

While highly convenient for home use, the 552s utilize plastic 'clocks' and selector pins, which are identified as high-failure red flags compared to solid steel gold standards. They align well with clinical dosage requirements for linear progression by offering 2.5lb increments, but the thermoplastic coating and internal plastic components fall short of the durability found in CPU-coated or stainless steel equipment.