Deep design is ideal for recessed and long-threaded fasteners fixed box end/ indexing ratcheting end design allows tech to break loose fasteners with fixed end and run fasteners out with the ratcheting end. 
Reversable 72 tooth ratcheting wrenches 
Deep design is ideal for recessed and long-threaded fasteners combining the functionality of a pass through socket and a ratcheting wrench head is fully repairable 
Spline drive works on 6pt/12pt/Torx/Torx Plus, 8mm, 10mm, 12mm, 13mm, 14mm, 17mm