From Allen® , the Original Manufacturer of the Hex Key, Dual Material T-Handle Provides Superior Strength and Ultimate Comfort for Extra Torque and Safety, T-Thru Handle Design Has A Long Arm with Ball End for Access and A Standard Hex Short Arm for High Torque, Ball-Plus® Hex Permits An Entry Angle Up to 25° to Work in Hard-To-Reach Areas, Heat Treated, Tempered Alloy Steel Provides High Strength and Resistance to Rotational Distortion, All Hex Keys Are Precision Formed to Exact Dimensional Tolerances for Precise Fit, Color Coded for Quick Identification:SAE-Green Allen 56656G Specifications: Brand: Ball-Plus® Product Type: Long Arm Ball End Wrench Set Wrench Type: T Handle Handle Type: Standard Material: Alloy Steel Material Category: Metal Finish: Black Oxide Number of Pieces: 10 Sizes Included: 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8in Measurement System: SAE