Products › Knife Kit 40' with Rollers - Double Drive Image 1 of 1 Knife Kit 40' with Rollers - Double Drive $5,701.00 Part #JD2029Compatible with: John Deere 640FD Add To Cart Added! Part #JD2029Compatible with: John Deere 640FD You Might Also Like Poly Head Tips - Outside Snout $41.50 Skid Shoe Kit 35' x 3/8" - Double Drive $1,156.00 Skid Shoe Kit 17-1/2' x 1/4" $747.50 Skid Shoe Kit 35' x 1/4" $963.50 Replacement Knife without Knifehead 16' $491.00