Slide Hammer Dowel Pin Puller Set, 24-Piece M3-M20

A 24-piece slide hammer kit built around threaded adapters rather than collets, so it pulls anything you can get a thread into. The set is a 2.2 lb (1 kg) hammer weight on an 11.8 in shaft with a 7.1 in stroke, one universal adapter, and 22 machined adapters: 11 male and 11 female covering M3 through M20. Shaft and adapters are AISI 1045 carbon steel with a galvanized finish, and everything sits in a blow-molded case with cut foam.

The job this earns its keep on is dowel pins. Bellhousing and case-half dowels corrode into their bores and will not come out with a punch, because there is nothing behind them to drive against. You thread the matching female adapter onto the exposed pin, lock it against the shaft, and drive the weight up the stroke. The pin comes straight out along its own axis, which is the part that matters -- a dowel pulled crooked wallows the bore and the case will never locate square against the engine again.

Same setup covers threaded work elsewhere on a rebuild: pulling frozen bolts and studs once you have threads to grab, backing bushings out of blind bores, drawing axle seals and small bearings, and freeing hub and flange hardware that has seized. Because it grabs by thread rather than by expanding collet, it reaches into holes where a collet puller has no room to open.

Two practical notes from the bench. Get the adapter fully seated and square before you start swinging -- an adapter running at an angle puts side load on the pin and defeats the point of a slide hammer. And match thread pitch, not just diameter; an M10 adapter run onto the wrong pitch will strip the pin before it ever moves.