Made from durable materials for long lasting performance. Suitable for dead bolt door locks and window security lock rack bolt mortice. Comes with a single and multiple packs to instantly replace lost keys and keep spares. Keeps homes secure and safe with this Rack Bolt Spare Star Key for Door and Window Locks. Important note: These are compatible Rack Bolt spares keys and may not be suitable for all locks. There are some other sizes available in the market some longer one and some thicker ones but we only sell these in 1 size.