WORKPRO 17-piece Folding Hex Key Set SAE/Metric Aluminum Cover Blue and Red Heat treated chrome vanadium steel Hex Keys in Metric SAE sizes 9-piece SAE hex key set: 5/64'', 3/32'', 7/64'', 1/8'', 9/64'', 5/32'', 3/16'', 7/32'', 1/4'' 8-piece Metric hex key set: 1.5, 2, 2.5, 3, 4, 5, 6, 8mm Constructed from Cr-v steel with bright chrome plated surface for durability and longevity Light aluminum handle for easy hold 9-piece SAE hex key set: 5/643/327/641/89/645/323/167/321/4&#034; 8-piece Metric hex key set:1.522.534568mm 4&#034;- Easy to hold Multi angle Hold as needed