Various striking heads: Five striking heads are rocker arm, ring arm, short straight arm, medium straight arm and long straight arm. Custom operation: The finger robot can set the upper and lower distance, time and frequency on the APP. Convenient buffer block: Convenient buffer block can be used to support the finger robot when there is no suitable position nearby. Fixed glue: is very sticky and not leave marks on the finger robot when torn off. Easy installation: The finger robot arm is installed by card slot, which is very convenient to install. Product Name:Fingerbot toolpack Product Size:Rocker arm12.6mm, Toggle arm 34mm, Short straight arm 10mm, Medium straight arm 13mm, Long straight arm 17mm Color:White Material:plastic Package Contents: 1 * Fingerbot toolpack 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.