Brand: Beta Tools
This 6-point "spinner" driver from Beta Tools features a sliding T-handle that can turn into an L-handle for maximum torque, then back to a T-handle for quick fastener spinning.  6-point nut driver fits any metric nut or bolt with a standard 10mm hex.  230mm overall length, 160mm handle length.  Hex is 8.5mm deep with a further 21mm deep recess to accomodate bolt threads.  Sold individually.  
This size is also available in the Beta Tools 950/S14 14-Piece Sliding T-Handle Metric Wrench Set (Part No. BT-009500082).