This is a Long Socket Wrench with Plug Grip from O.S. Engines.

FEATURES: This special glow plug wrench is for use with cowled engines or those having deep heatsink type heads (car and helicopter engines). It has an internal grip which holds the plug securely while it is being withdrawn or reinserted.

INCLUDES: One Long Socket Wrench with Plug Grip

SPECS: Length: 3-7/8" (9.8cm) ir/kh  

BOX DIMENSIONS: 3.13" W. X .50" H. X 4.50" L. BOX WEIGHT: .14 LBS.