Description:Surface System: sticks particularly well to smooth surfaces. Also protects against scratches.Strong Neodymium Magnets: Especially strong pulling force. 22mm/0.87inch, 43mm/1.69inch, 66mm/2.6inch diameter and up to 25kg adhesive force.With Thread: with threaded pins, internal thread or threaded hole in the screw size. Great for screwing and mounting.Rubberised Magnetic System: Gentle on surfaces, extremely adhesive, non-slip, ideal for outdoor use.Durable Material: The round pot magnet is made of magnet, steel, silicone, rubberised. The thread has been accurately manufactured.Specification:Material: Magnet, Steel, SiliconeSurface: Nickel Copper Nickel+rubberisedColor: BlackDiameter: About 22mm/0.87inch, 43mm/1.69inch, 66mm/2.6inch, 31mm/1.22inch, 88mm/3.46inch22mm/43mm Thickness: About 6mm/0.24inch, M466mm Thickness: About 8.5mm/0.33inch, M/531mm Thickness: About 6mm/0.24inch, M/588mm Thickness: About 6mm/0.24inch, M8Pull force(Kgs): 22mm 5.8, 43mm 10, 66mm 25Quantity: 2pcs, 3pcs, 6pcsTypes: 1(External thread 22mm 3pcs), 2(External thread 22mm 6pcs), 3(Internal thread 22mm 3pcs), 4(Internal thread 22mm 6pcs), 5(Flat thread 22mm 3pcs), 6(Flat thread 22mm 6pcs),7(External thread 43mm 3pcs), 8(External thread 43mm 6pcs), 9(Internal thread 43mm 3pcs), 10(Internal thread 43mm 6pcs), 11(Flat thread 43mm 3pcs), 12(Flat thread 43mm 6pcs),13(External thread 66mm 2pcs), 14(Internal thread 66mm 2pcs), 15(Flat thread 66mm 2pcs), 16(External thread31mm 3pcs), 17(External thread88mm 2pcs)Package includes:3pcs x Neodymium magnet3pcs x Gasket3pcs x NutOr6pcs x Neodymium magnet6pcs x Gasket6pcs x NutOr2pcs x Neodymium magnet2pcs x Gasket2pcs x NutNote:1. Due to the light and screen difference, the item 039;s color may be slightly different from the pictures.2. Please allow 1-2 cm differences due to manual measurement.