Type: 9-piece hex key / Allen key setMaterial: Chrome-vanadium steel (CR-V) for strength and durabilitySizes included: Ranges from 1.5 mm up to 10.0 mm (along with marked Torx/star profile compatibility references like T-10 to T-50 on the packaging layout)Design: Long arm L-type wrenches held in a folding plastic organizer holder