hese Hex Key Wrenches and allen keys are manufacturers out of high Gade Alloy Steel. Hardness of 50 HRC done as per international standard for High Torsional Strength. Available in Black oxide finish along with the protective coating of rust preventive oil. Available in size 1.5mm to 32mm & 1/16 to 1". Available in loose packing as well as sets. Allenkey Sets are available in pouch packing and in plastic holder with blister packing in option of 10 Pcs. or 8 Pcs. Set. Also Available T-Handle Type Allenkeys.