Lincoln K and KP Numbers › Lincoln Electric KP2920-1 THRU-ARM BREAK-AWAY DISC Lincoln Electric KP2920-1 THRU-ARM BREAK-AWAY DISC Sale Price: $155.15 Original Price: $173.77 THRU-ARM BREAK-AWAY DISC PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! THRU-ARM BREAK-AWAY DISC PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000