For Makita Insert Socket Set Shockwave Impact Socket Adapter Set, 2 sets per pack. For Makita Driver Adapter Dimensions:1/4Inch 3/8Inch 1/2Inch. Made byprecision machining ofchromiumvanadium alloy steel with special heat treatment. Each square head has a spring-loaded ball bearingsection that can effectively secure the socket and prevent sliding. performance-optimized and heat-treated S2 steel provides more flex and more durability than standard, brittle bits. Colour:As Shown Material:alloy steel Package Contents: 2 sets * Driver Socket Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.