Lincoln K and KP Numbers › Lincoln Electric KP3990-1 DRIVE ROLL INSUL KNURL MAGNUM PRO Lincoln Electric KP3990-1 DRIVE ROLL INSUL KNURL MAGNUM PRO Sale Price: $123.46 Original Price: $138.28 DRIVE ROLL INSUL KNURL MAGNUM PRO PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! DRIVE ROLL INSUL KNURL MAGNUM PRO PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000