SZHOWORLD&reg; Multifunction Retractable Utility Knife Slim Paper Knife Bottle Opener Screwdriver Keychain Tool Martensite stainless steel manufacturing, integration of nanowires cut, office, self-defense, keychain carry, EDC good tools Size: 10 cm in length, height 2.7 cm, side width of 3 mm More attached to 1 piece of blade [blade for high carbon steel material] In addition to art paper cutting function, also the function of keychain accessories/screwdriver/bottle opener. Confidentiality is strong, scalable, portable, sharp blade, can be used in all kinds of daily use, more suitable for outdoor activities