This is the best tool you will ever find for replacing the tappet rollers on Knuckles, Pans, Shovels, and Ironhead Sportsters.  This tool is 100% made in the USA and is built to last.  It's not cheap, but it's the best one you'll find anywhere. 

Product Info:

• Allows for fast, easy, and precise replacement of tappet rollers.
• Fits lifters from 1936-1983 Big Twin models, 1957-1985 XL models, or any other lifer with a .730-.740 body diameter, .850-.855 roller diameter, and .355-.370 roller width.  Will not fit evo or twin cam lifters
• Precision machined with very tight tolerances for a perfect fit.  Lifter will not move around when performing operations.
• Type III mil spec hard anodized finish for incredible durabilty.
• Easily clamps into vise to make the whole job easy.
• 100% made in USA
• Lifetime warranty

How to Use:

Step 1: drill out ends of old axle

• Use included 7/32" drillbit and drill about 1/16" into each side of the old tappet axle.
• Lightly oil the drill bit before putting in through the hardened drill bushing.  Be sure to blow chips out in between drilling the two sides of the lifter. 

Step 2: Drive out old axle

• Carefully drive out the old tappet axle using the included pin punch.  This should take a few firm strikes from a 16oz ballpeen hammer.  If 2-3 firm strikes aren't enough to start moving the old axle out, take out the lifter and move it back to station/step 1 and drill out a little more of the end of the axle before continuing again to step 2 and driving the axle out. 

Step 3: Install new roller assembly and set the ends of new axle

• Install new/replacement roller assembly and axle into lifter body.  New axle should slide right through lifter body without being forced.  Set lifter assembly into station/step 3 of the tool and use the included roll pin punch to lightly set the ends of the new axle on each side.  This should take just 2-3 light/medium strikes with a 16oz ballpeen hammer.
• Its best to flip the lifter back and fourth a couple of times between the first few light strikes with a hammer.  Axle should remain centered within the lifter body, with an equal amount of the axle protruding out of each side.  

Warning:

• Be sure the new axle is secure and has no detectible movement.  
• Be sure the new roller moves freely