Brand: Beta Tools
The 951 Series "spinner" drivers from Beta Tools feature a sliding T-handle that can turn into an L-handle for maximum torque, then back to a T-handle for quick fastener spinning.  The high-polish, chrome-plated finish on the leg and the handle looks great and feels good in your hand.  All three ends (extended end plus both ends of the handle) have the same metric (mm) size male hex "Allen" drive.  
Hex size: 3mm 
Leg length (L): 150mm 
Handle length (L1): 63mm 
Leg diameter (Ø): 4mm 
Hex length (H): 6.5mm on all 3 ends 
Weight: 22g 
Sold individually.