Index tool allows for specifying the location of the ground electrode for maximum flame front generation.
Soft copper spark plug washers are used in conjunction with the indexer to align ground electrode as well as adjust plug to piston clearance (washers sold separately).
Gold anodized billet aluminum with knurled edges for hand-held use - can also be vise-mounted.
Designed for 14mm spark plugs.
Made in the U.S.A.