PERFECT FOR HARD TO REACH AREAS: These extra long ball hex keys increase reach and leverage in hard to reach areas and the ball head design allows you to turn hard to reach fasteners from up to a 30 degree angle. GREATER ACCESS: With a T-handle for greater access, they are supplied with a handy storage holder and extra grip handle. SIZES: The set includes key sizes 1.5mm, 2m, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm and 10mm.