Description: Applicable to grassland, garden, courtyard, floor, can also be used in the construction industry. -piece plastic sole, heavy-duty and durable, and the zinc alloy buckles fix the fastener tight and firm. Adjustable straps fit most sizes of shoes, directly attach it onto shoes then start aerating. Digging a small hole in the to provide nutrients for grass roots. Easy to use and assemble, come with a mini wrench, just fix the nails on the sole with screws, put straps through buckles, finished within . Specification: Color: Black Size: 30X13CM Nail: 570 cm Material: PP Package Includes: 2x Lawn Aerator Shoes Sole 4x Shoelaces 2x Triangle Strap 26 Pair Screw and Nut 1x Wrench 1x User Manual Note: Conversion: =2.54cm, 1cm=0.393inch Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!