1/4 Inch Drive x 11 mm Deep 6-Point Impact Socket Shopify Collective and a steel spring

and a steel spring

Diameter: 9/16"-18

Vibra-Tite #: 122

The adjustment knob is knurled and round to provide grip for making adjustments even when you're wearing gloves or have slippery hands

Part Number: BIT-D/APO

1/4 Inch Drive x 11 mm Deep 6-Point Impact Socket Shopify Collective and a steel springTwo Size Markings The size is marked in two ways, both as a high visibility laser marking and a permanent stamped marking Full Length Socket Well The interior well extends fully into the socket, which allows for better fastener engagement in more situations Works With Friction Ring or Detent Pin Anvils Smooth walls inside the drive end and a detent pin hole make the sockets compatible with both drive tool anvil types Prevents Fastener Round Off