Gripper are used to hold parts in machine. Some standard applications are picking, placing, holding of object. The grippers are the end effectors of the robotic arms.

Pneumatic and Electrcial Grippers differ in the source of energey.
Pneumatic grippers used compressed air while the electrcial grippers need electricity to work.

FESTO Offers wide range of gripers.
The Pneumatic gripper range includes
1) Paralle Grippers - DHPS, HGPT,DHPC, DHPL, HGPP, HGPL etc
2) Angle Grippers - DHWC, DHWS etc
3) Radial Grippers - HGRT, DHRS, DHRC etc
4) 3 Finger Grippers - HGDT, DHDS etc Electrcial Grippers
5) Parallel Grippers - EHPS