... small, practical life-saving card ,put one in the wallet ,another hanging on a key ring, whether ... a try?1. Tin opener: the hook below should be coordinate with the blade above, easily open tin cans ... sharp edge, can cut off the rope, it is not a problem after washing the knife clearly.5. Position ... and nuts.8. Straightedge rule: adopt metric scale, the minimum scale for mm.9. Bottle opener: suitable ...