Suitable for use in flammable environments. - They have a 12-pt. - box end with additional grooves that make it easier to connect with the head of the fastener and connect at more angles for better accessibility compared to a 6-pt. wrench. - The opposite side has an open end design that allows top and side access to the fastener compared to the box end that can only access a fastener from the top. - Wrenches contain no iron, are nonmagnetic, and are suitable for use with magnetic resonance imaging (MRI) equipment. - These wrenches have the same SAE (inch) size on each end for use on one specific size fastener. Material / Aluminum Bronze Nickel Finish / Natural Head Size / 7/8 in Overall Length / 11 3/4 in Head Offset Angle / 15 Degrees Opening Angle (Deg.) / 15 Degrees Head Type / Offset Measurement Type / SAE Opening Type / Rounded Box End Type / 12-Point Box End Number of Points / 12 Tether Style / Tether Capable Nonsparking / Yes Non-Magnetic / Yes Handle Color / Silver Corrosion Resistant / Yes Wrench Length Style / Standard Standards / ASTM F2503, ASTM A342, NFPA, FM Approved Weight / 0.8 lb Handle Type / Ergonomic Wrench Shape / Straight