MODEL NUMBER - Drive Socket Kit - 891. & STRONG - The package is manufactured from top class material and tests were performed for lengthy lasting use. You needn't worry about replacing it frequently, saving your time and the upkeep cost. COMPATIBLITY - socket couples the motor to the blade assembly and protects the motor if the blade assembly is blocked from rotating. This alternative stress socket kit is never to be used with the XL. EASY TO INSTALL - It will take you about 10 minutes to switch the new force socket kit. DIY installation, packed with accomplishment. size:Approximately 4 in diameter Material:plastic colour:black Package Contents: 1 x Drive Socket 1 x Hex wrench Only the above package content, other item will not be included. Note: Light and sundry reveals can cause the colour of the object within the photograph a chunk assorted from the genuine thing. The measurement allowed error is +/- 1-3cm.