Rulers: Haven't yet but some are showing wear and tear
Cutting Mats: Haven't yet but some are showing wear and tear
Rotary cutters: Does it count that I went to buy blades and it was cheaper to buy another rotary cutter?
Rotary blades: When they start to skip
Pins: Constantly, I must be hard on pins because I am always needing more pins
Needles: hand and machine get replaced as they get dull
Chairs: Still on original one
Sewing Machines: First one lasted 10 years (never liked it), Second one is still going strong after 20 years.
Scissors: "Replace after someone uses them for cutting something like sandpaper, wire....."
Seam Rippers: When I loose them! Somewhere in the house is a huge pile of seam rippers, I just haven't found it yet.