RGM Soft Grip Painting Knife #040 (Yellow Handle) RGM Painting Knives from $5.87 $9.95 Qty. Add to Cart SKU: RGR040 This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Length: 1 1/8" Width: 1/2" (2 2/10cm x 1 2/10cm). RGM Painting Knife Plus #40 with Yellow Rubber non-slip handle. Tweet