Thank you for viewing. Ideal for working in tight spaces where standard wrenches can't reach. Ultra-thin type: The significantly reduced thickness allows use in gaps where conventional tools cannot fit. Wide range of applications: Perfect for light tasks such as replacing casters on desks and chairs, replacing power tools, circular saws, and grindstones, and hobbies. High quality, with nickel-chrome plating on the surface for excellent rust resistance. Set contents: 5-piece set (8x9mm thickness 3.2mm, 10x12mm thickness 3.2mm, 11x13mm thickness 4.0mm, 14x17mm thickness 4.0mm, 19x21mm thickness 4.0mm), compatible with various bolts and nuts. Made in Japan, for peace of mind. Brand new and unopened. Please understand that this item is stored at home before purchasing. Shipping is anonymous. Please feel free to ask if you have any questions.