This is a replacement bolt for the gear set. If using the recommended portable power Drillset, these should last an estimated 2,000 to 3,000 cycles. Drive bolts are considered wear items and are not covered under warranty. **Using a 1/4 or 3/8impact will shorten your life to half. Use of 1/2 impacts voids binderwarranty immediately. Here is an instructional video on drive bolt replacement. Replacement Drive Bolt Fits all Speedbinder Torque Drive Binders 14 mm – 6 Sided Socket (Preferred over 9/16″) Sold as Each