The C-Type jaws have sensors added to them to detect when the jaws are in the closed state with a part/sprue clamped within them.

*Includes sensor: SN 1.5, SP 1.5, SN 1.5-P, SP 1.5-P or SP 1.5 PM1.2

• EC (C-Type): Stroke with sensor.
  Available in 30-32 size bodies.
  
  

• EC (C-Type): Stroke with sensor.
  Available in 30-32 size bodies.
  
  
• ERT (R-Type): Jaws with stroke. Flat with teeth, allowing for a larger gripping surface area. This prevents hot plastic from getting caught inside the countersink holes of the T-type.
  30-32 size body.
  
  

• ERT (R-Type): Jaws with stroke. Flat with teeth, allowing for a larger gripping surface area. This prevents hot plastic from getting caught inside the countersink holes of the T-type.
  20-16 and 20-32 size body.