MODEL NUMBER - Drive Socket Kit - 891. DURABLE & STRONG - The equipment is manufactured from top rate supplies and tests were performed for lengthy lasting use. You 't must fear about changing it frequently, saving your time and the upkeep cost. COMPATIBLITY - socket couples the motor to the blade meeting and protects the motor if the blade assembly is blocked from rotating. This replacement strength socket package isn't always for use with the XL. EASY TO INSTALL - It will take you about 10 minutes to interchange the new force socket kit. DIY installation, full of accomplishment. size:Approximately 4 in diameter Material:plastic colour:black Package Contents: 1 x Drive Socket 1 x Hex wrench Only the above kit content, different item are usually not included. Note: Light and various exhibits can cause the color of the article within the picture a little bit varied from the real thing. The measurement allowed error is +/- 1-3cm.