Proto socket adapters are designed for fastening damaged and stubborn nuts or bolts in automotive and industrial machinery maintenance & repair services, as well as supply operations and metalworking applications. These sockets feature the brand's patented TorquePlus radius-corner design for easier socket engagement and shifting the stress from fastener corners to minimise the slippage. They are further responsible for distributing the contact stress over the socket area for a secure connection and highly reducing the fastener rounding over repeated usage. Choose from a wide range of these socket adapters, available in 35, 36, 38 and 41 mm size configurations on Raptor Supplies.