This is a simple robotics kit that is great for "getting a grip" on smaller robotics projects! Designed for use with a servo, the gripper kit is easy to assemble and requires only a Phillips Head Screwdriver. This Micro Gripper is capable of opening 2.75" wide max, has an overall body length of 1.7" long with a 1.3" wide servo housing body, and offers three 6-32 mounting through-holes along the edges of the servo housing.