You get a corner grinding machine wrench, 3 angle grinding machine extension axes (3 inches, 4 inches, 5.5 inches) and 12 sets of internal and external grinding snails, compatible with most grinding beds and locking nuts, flexible and portable familiesUse, these grinding beds are suitable for 4-1/2 inches, 5-inch, and 7-inch grinders compatible with DW400, DW4011, DW401, DW00, DW849, D28402, 9005B, 9015A/B, 9016D, 224399-1, 193465-4 and 224568-4; please check the size and compatibility before buying， Made of 45 steels and nickel plating to its practicality and durability. You can use 3 extension rods or connect them to form a longer rod to help you reach ordinary grinding machines or polishing machines cannot be unable to reachThe narrow, tight or embarrassing place to reach.adjustable grinding wrench is compatible with most grinding beds and locking nuts. It is generally suitable for 4 inches, 5 -inch, 6 -inch, 7 -inch, 9 -inch corner grinding machine. The flange nut of the grinding machine is made of hard carbon steel. The nut is stronger, more wear -, and has good heat dissipation, which is conducive to extending the service life;Containing lubricating oil Use our grinding bed nut kit to improve the performance of angle grinders.When replacing, adjust the appropriate width of the grinding wrench to be suitable for grinding nuts.Tighten the new outer lock nut with adjustable corner mill wrench, and then your corner mill can work normally Features: Our grinder nut kit greatly improves the performance of your angle grinder. The obvious convenience of being to adjust the grinder wrench width to fit the grind nut simplifies the assembly and replacement process. The flange nuts of our grinders are made of solid steel for extra strength and wear resistance. These nuts also have great heat dissipation for extended service life. Colour:As Shown Material:Metal Size: Grinder extension shaft: 3 inches, 4 inches and 5.5 inches Package Contents: 1 * set angle grinder extension rod Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.