This is the Hobbico Panel-Ready Twist-Lock Glow Plug Clip.
FEATURES: Clip is made of Chrome Plated Steel
Pre-installed banana plugs for plugging into a Power Panel
Clips to most Glow Plugs but not to Glow Heads (e.g., Cox engines)
One year warranty
INCLUDES: One Twist-Lock Glow Plug Clip with pre-installed banana plugs
REQUIRES: Plugging into glow plug receptacle in a Power Panel
SPECS: Clip Length: 3¾"
Wire Length: 30"
COMMENTS: Unlike most other clips this needs no soldering