Master Every Project: This set includes 17 different sizes. 9 SAE Allen wrenches: 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4" and 8 Metric Allen keys: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm. Perfect for bicycles, furniture and electrical repair applications High torsional strength material: The Allen wrenches are made of chrome vanadium steel (Cr-V) for excellent durability and resilience. The black oxide treatment on the wrench surfaces enhances rust resistance and extends tool life High Performance Grip: The PP+TPR grip used in the hex keys has excellent torque control and non-slip comfort, which can reduce fatigue during long-term use Enhanced Performance: The chamfered edges and adjustable 315° angle of each hex wrench improve operational smoothness and versatility, allowing effortless use even in tight spaces Super Compact Design: Space-saving foldable design with a closed size of 4.6 x 1.7 x 1.2inches. The weight of each Allen wrench is 190 grams for Metric and 180 grams for SAE. Fits easily in pockets or toolkits, no more losing them ARROW 17PC Folding Hex Key Set- SAE/MM