This heavy-duty Apprentice™ Drill Bit Extender adds to the reach of any 3/8" dia. shank drill bit. Perfect for drilling pepper mills and similar projects, the robust 3/4" diameter shank helps bits drill more accurately with less flexing. Drill bit not included. Made in USA. Precision machined from Stainless Steel Heavy-duty 3/4" diameter shank reduces flex and wandering Extends drill bit reach by 6"/10" Double set screws hold bits securely in place Accepts 3/8" diameter shank bits 6" Drill Bit Extender overall length 7-1/8" 10" Drill Bit Extender overall length 11-1/8" 3/8" diameter shank size Requires a minimum 7/8" hole for use. Will not work with bits under 3/4". Not compatible with Maxi-Cut bits. Made in USA WARNING:This drill bit extender is designed for use in the tailstock of a wood lathe where it remains stationary when drilling. A drill bit extender should NEVER be used in a drill press or any other powered equipment as it may result in serious injury.DO NOT exceed 500 rpm when drilling.