Mobile Sharpening Service’s Truk Tolstad, will sharpen your knives every second Tuesday of the month, at the Lynden Community/Senior Center, from 10AM-4PM. For Seniors - 62 and older, there is a 50% discount. Standard prices are: Knives are $1/inch, Scissors $2/inch. Payments can be made with either Cash or Credit Card. Truk will be parked outside the center to do the sharpening for you.