The light pull drive is a friction drive with steps 1/8"(3.2mm), 1/4"(6.35mm, 3/8"(9.5mm), 1/2"(12.7mm) and 5/8"(16mm). Simply slip the blank onto the drive, bring up the tailstock until the blank is supported by the revolving centre and away you go. The drive is designed to allow plenty of room to work around the light pull, including sanding and finishing. This version fits the Precision Pro pen lathe only. It has a 12mm parallel shank and requires a 11-12mm ER20 collet, 910214.