Valve and rocker adjustment tool to suit tappet adjusters that have 3/16" Whitworth locknuts. A British tool company based in Warwickshire, United Kingdom. Laser Tools draws on years of experience to introduce quality products which offer real value for money. All our products are responsibly sourced both from trusted ethical partners across the world PLUS (uniquely as an automotive tool brand) our own manufacturing base in the UK. Combining our British manufacturing, our years of experience and vast expertise in the automotive sector helps us achieve our aim of bringing high quality tool solutions first to market and being No.1 choice for many professional mechanics.