Forging with industrial-grade steel, integral heat treatment, higher hardness and impact resistance. Hexagon screw connection and concave groove design to prevent falling off. Fine polishing electroplating anti- knurling surface fine polishing treatment, bright chrome electroplating, knurling design to increase friction. supporting storage plastic boxes are practical and , and easy storage tools are not messy and more convenient to carry. Name: -V -V steel sleeve Long version 6pcs 1 or 2 inch: 12 or 14 or 17 or 19 or 21 or 22mm Colour:silver Material:steel Package Contents: 6 x 1 or 2 long hexagonal sleeve 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.