We now offer Pin Chucks for the most popular spindle thread sizes with a 1" diameter pin arbor 1-1/2" long. It utilizes a 3/16" diameter hardened steel pin which sits in a pocket on the arbor. To effectivly use this chuck simply drill a 1" diameter hole in your work piece 1-1/2" deep. Then, slip the work piece onto the arbor and twist clockwise to lock in position. To remove simply twist counterclockwise. Each Pin Chuck has flats for a 1-3/4" wrench and 2 holes for our 2SW spanner wrench.