MODEL NUMBER - Drive Socket Kit - 891. DURABLE & STRONG - The equipment is made of premium materials and tests were performed for long lasting use. You 't need to worry about changing it frequently, saving your time and the maintenance cost. COMPATIBLITY - socket couples the motor to the blade meeting and protects the motor if the blade meeting is blocked from rotating. This substitute drive socket package isn't for use with the XL. EASY TO INSTALL - It will take you about 10 minutes to switch the new strength socket kit. DIY installation, packed with accomplishment. size:Approximately four in diameter Material:plastic colour:black Package Contents: 1 x Drive Socket 1 x Hex wrench Only the above package content, different products aren't included. Note: Light and varied displays can cause the color of the object in the picture a chunk assorted from the genuine thing. The size allowed error is +/- 1-3cm.