Locking mechanism eliminates expulsion of dipstick handle under trans pressure. Bolted in sealed pan fitting. Large filler tube accepts standard transmission funnels. Made from 6061 aluminum. Teflon-lined stainless braided outer housing. Flexible inner dipstick measuring cable. Supplied with transmission storage plug for quick change and storage. No pan fitting leaks during storage. Dipsticks available with firewall mount or transmount mounting bracket. Available in clear, black, red and blue anodized or polished aluminum. Now NHRA excepted.