SKF BEAS 015045 C-2RSH Double Row Angular-Contact Ball Bearing, High Precision Bearing - 15 mm ID, 45 mm OD, 25 mm Width Inner rings The white nylon striking insert

The white nylon striking insert with a hardness of Shore 85D is a very hard

The ratcheting box end is designed to need as little as 5° to move fasteners versus 30° for standard wrenches and features off-corner loading for a better grip on the fastener and reduces fastener rounding

5 mm = 1/2" drive

Bit adapter insert

SKF BEAS 015045 C-2RSH Double Row Angular-Contact Ball Bearing, High Precision Bearing - 15 mm ID, 45 mm OD, 25 mm Width Inner rings The white nylon striking insertHigh Precision Angular Contact Ball Bearing SKF high precision angular contact ball bearings are designed for machine tool spindles and other high precision applications. They feature optimized internal geometry for high speed capability and precision. Available as single bearings and as universally matchable sets for various arrangement configurations. Manufactured to super precision tolerances.