The size of the interface is 1/2 inch, which is used to fix the connecting rod, air cannon, wrench, etc. durable and can be used with pneumatic air cannon. Specially designed for impact strength, low-key design, suitable for narrow and hard-to-reach areas. insertion of precision chamfering bit end You will receive a 1/2 hexagonal sleeve tool set, which can meet your . specifications Name: 1/2 hexagonal sleeve tool set Model: T80 T90 T100 Interface: 1/2 inch Material: steel colour: As shown Package Contents: 1 x Hexagon sleeve set 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.