Here’s a quick https://toolguyd.com hands-on review of Allen’s T-handle ball hex driver set. These Allen keys have a hybrid L-key and T-handle design, meaning that you have a long shaft with a ball-hex end for easier fastener access, and a short straight-hex end for higher torque application.
Price is ~$25-30. Purchase links:
https://www.amazon.com/ALLEN-Brand-T-Thru-Handle-Wrench/dp/B005UNKZD4/?tag=toolguyd-20
https://www.allenhex.com/ALLEN-Brand-T-Thru-Handle-Wrench/dp/B005UNKZD4
Post time: Jul-15-2017
