Universal Wrench Extension Adapter 1/2 inch drive or 21mm hex drive Drop forged body with heat treatment Extendable for all kinds of wrenches Designed to extend your wrench with another wrench or power bar giving more leverage on stubborn nuts and bolts Color: Black Material: Metal Size: 8 x 4.5cm Package Contents: 2 x Hex Drive Universal Wrench Extension 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 a little different from the real thing. The measurement allowed error is +/- 1-3 cm.