I thought all Wheel Keys were the same !! View our forging facilities here VALVE WHEEL KEY / VALVE WHEEL SPANNER 8", 12", 18", 24", 36".  All sizes SOLID FORGED The tools are available in the following sizes: 8" (200mm), 12" (303mm), 18" (460mm), 24" (610mm), 36" (915mm). All sizes are manufactured as solid forgings. Some companies manufacture Valve Wheel Keys as a fabricated unit, but this usually requires two welds, which could produce a stress point causing the tool to fail when in use.  Also, please be aware that some companies OFFER 18", 24" & 36" sizes as 'EXTENDED' versions of the smaller sizes.   'EXTENDED'  means there is some form of mechanical extension, rather than a totally  'solid forged' Wheel Spanner.  Read about the DANGERS of welded, fabricated and extended Wheel Keys read more here. ROBIN J GREEN LTD.  Unit 6, Bakehouse Mews, Orchard Street, Yeovil, Somerset. BA20 1BB United Kingdom. Telephone: 00 44 (0) 1935 425400 Fax: 00 44 (0) 1935 433311 Mobile: 0771 4654354 e-mail: robingreen@btopenworld.com e-mail: robingreen@btopenworld.com Or e-mail us: e-mail: robingreen@btopenworld.com