Physically these are identical to standard sockets except for the black coating. Under the skin they are specially hardened to resist the high torque forces and vibration from manual impact screwdrivers and powered impact wrenches.

Blue Spot Tools 11 PCE 3/4" Metric Deep Impact Sockets (17-38mm)
5.0

US PRO 12PC 3/4'' DR 6PT Deep Impact Sockets Metric 24 - 41mm 1360
5.0

US PRO Tools 3/4" DR 17mm - 60mm Impact Socket Set HGV Long Reach Impact Sockets 3690
4.0