Test Sockets & Adapters > Test Sockets for BGA - Bumped chip - WLCSP - eMMC Package > Pitch from 0.30mm to 0.39mm > Elastomer Solderless Compression Test Socket > 
Which socket retainer style is needed?
Various factors will influence the choice of the retainer solution chosen, such as:
- How many times will the socket be opened each day?
- Cost of socket?
- Is there any space limitation for the socket ?
- Access required to the die of chip / heat dissipation (open top?)
PLEASE SELECT THE RETENTION – RETAINER SYSTEM FOR YOUR FUTURE SOCKET :
