Astro Pneumatic Tool 78618 Brake Caliper Wind Back Tool Set, 18 Piece

BMW E90 dual-pin rear calipers are confirmed not covered by the 78618's adapter set. The kit covers push-in and screw-in wind-back pistons on domestic and VW European rear calipers, but European dual-pin coverage (BMW, Audi, Mercedes rear calipers) is not independently confirmed in the available community evidence.

Yes, the 18-piece set includes both a left-hand (L) and right-hand (R) threaded T-handle drive screw, allowing it to address rear caliper pistons that wind in from either direction, depending on caliper side and vehicle make.

The kit includes a magnet in the drive assembly that holds the adapter disc to the tool face during piston engagement, confirmed by multiple owners as preventing the adapter from slipping off the piston during compression.

A vehicle compatibility cross-reference chart is included in the kit, listing which adapter number corresponds to which vehicle application. Owners note the chart is useful but has documented gaps, including at least one vehicle application (Mini R50) listed with an adapter number that was not present in the kit. There are no step-by-step usage instructions.

The Amazon listing for Astro Pneumatic Tool 78618 Brake Caliper Wind Back Tool Set, 18 Piece carries a California Prop 65 warning. California requires this warning on a very wide range of manufactured goods — including rubber, vinyl, plastic, and metal automotive parts — whenever trace exposure to any of roughly 900 listed substances (commonly phthalates or heavy metals) is possible, regardless of whether the specific product poses a meaningful health risk. As a passive tool, Astro Pneumatic Tool 78618 Brake Caliper Wind Back Tool Set, 18 Piece has no Safety Data Sheet, so there's no chemistry breakdown to translate beyond that.