Beta Tools Copper-Berillium (Cu-Be) Spark-Proof Tools are specifically designed for safe operations in environments subject to potential risk of explosion, in the presence of flammable liquids and gases, or for any applications that require using perfectly antimagnetic, corrosion-resistant tools.All tools are certified by the Federal Institute for Materials Research and Testing (BAM) under European Directive 99/92/EC.Warning! Risk of explosion in ACETYLENE environment. The mechanical characteristics of spark-proof tools differ from those of normal steel tools. They should be used with extreme caution, avoiding overloads..tg {border-collapse:collapse;border-spacing:0;}.tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;}.tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;}.tg .tg-5ua9{font-weight:bold;text-align:left}.tg .tg-s268{text-align:left} Beta Tools - Spark-Proof Double Open End Spanner (Imperial) Range Product Code Part Number Size A A1 L S Weight \" mm mm mm mm g 000550853 55BA-AS 3/8X7/16 3/8 x 7/16 23 26 110 6.3 60 000550854 55BA-AS 1/2X9/16 1/2 x 9/16 29 31 130 7.1 90 000550857 55BA-AS 5/8X11/16 5/8 x 11/16 35 38 160 7.9 155 000550859 55BA-AS 3/4X13/16 3/4 x 13/16 41 44 180 9 225 000550865 55BA-AS 7/8X15/16 7/8 x 15/16 46 49 210 10.2 305 000550868 55BA-AS 1X1.1/16 1 x 1.1/16 51 55 230 11.4 405 000550870 55BA-AS 1.1/8X1.3/16 1.1/8 x 1.3/16 59 61 245 13.7 548 000550872 55BA-AS 1.1/4X1.5/16 1.1/4 x 1.5/16 65 67 255 15.4 600