If you've ever replaced a front main seal on a Miata, you know how easy it is to mess up the install — and how annoying it is to find out after everything's buttoned up and the car's leaking oil again. This tool takes the guesswork out of the job. Slip it over the crank snout, thread in the crank bolt, and tighten it down. The tool pulls the seal in evenly and stops at the correct depth — no eyeballing, no overdriving. You get a perfect install every time, and peace of mind that the job's done right. Machined in-house from billet T6 aluminum on our CNCs, this tool is built to last a lifetime. A must-have if you're doing your own timing belt or front-end service. Fitment: Fits all 1991 “long nose” Miata engines (VIN higher than 209446, with 8-slot crank pulley) Also works on all 1992–2005 Miata engines