The 96BPC series of Allen hex keys are designed for professional use. The satin-finish chrome plating wipes down easily after use. The short leg and the extended leg of the L-handle both have the same metric hex. The hex at the end of the extended leg has a ball profile to allow up to 30 degrees of misalignment with the fastener. This 9-piece set of hex keys includes a folding case that locks all the keys in place when you snap it closed. The interior of the case has a molded strip on each side and closing the case forces the strips against the keys to positively lock them in place. When you open the case, pressure is released and the case acts like an ordinary holder. This set includes the following metric sizes: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm.