American Classic 9mmm / 10mm Thru Axle QR

American Classic's front 9x100mm Thru Axle QR allows a 9x100mm thru axle hub to be fitted in a standard QR dropout fork.  
It provides a stiffer clamping force on the hub to stiffen up the dropout/hub interface to greatly reduce the twist of the fork.

American Classic's Rear 10mm Thru Axle QR allows a 10x135mm thru axle hub to be fitted in a standard QR dropout frame.  It provides a stiffer clamping force on the hub to stiffen the dropout/hub interface to reduce lateral twist at the back end.

American Classic say :-

The purpose of the 9mm front and 10mm rear thru axle system is to
stiffen a standard QR mountain bike frame without unscrewing an
unwieldy, heavy bolt. Our Thru Axle Quick Releases act as an axle and
centers the hub in the QR fork or frame drop out without fishing for
adjustment. It's easy to change the wheel because it is a quick release,
 not a bolt. Mechanism clamps tightly. It is stronger than a traditional
 QR skewer with a beefy aluminum shaft and steel contact points against
the frame for superior grip. For a noticeable improvement in stiffness,
try the AC Thru Axle QR’s.

Weight : Front 9x100mm 62g, Rear 10x135mm  76g