The T47 Double Support Key Tool features interface sizes 16 and 12 with an available adapter to support different T47 support standards. All socket support models are manufactured with precision via CNC for fitting and removing various external support cups. They are made from aluminum and have an anodized red finish for a durable surface and precise fit that will not damage the external aluminum cups. The knurled surface on the side of the socket provides better grip during manual tightening, while the 1/2˝ socket accommodates the use of torque wrenches, ratchets, and screwdrivers.