Specifications: HW-229B Tip sizemm L (2mm) S (1mm) 1.5 74 14 2.0 81 16 2.5 87 18 3.0 96 21 4.0 107 24 5.0 120 28 6.0 138 32 8.0 155 36 10.0 173 40 Product Description:Nine piece set of ball point long arm hex keys. Comes with holder to allow for easy storage and transportation. The SAE 6150 material provides high quality strength, while the with Satin finish gives it an aesthetic sheen.Features:1.Ball head slides easily into socket and can drive or loosen from an angle of 25% off-axis2.Made from Cr-V Steel with stain finish, durable and high torque.3.Heat-treated and tempered for added strength and durability4.Complete with polyethylene holder