1. The attachment is suitable for riveting nuts made of aluminium, steel and stainless steel. to the maximum service life of the tool, the maximum speed of 240 rpm required for this device must never be exceeded. 2.There are six different retraction spindles (M3, , M5, M6, M8 and M10). This rivet nut attachment turns any drill into a powerful rivet tool that allows you to process rivet nuts in sizes from M3 to M10. 3.with 1/4 inch hexagon drive, the drill rivet attachment can be used with standard drills. Compared with the traditional riveter, rivet drill adapter makes riveting work so easy. 4.The Electric Drill Adapter kit comes with a sturdy handy plastic case for easy protection and storage all things. 5.This rivet drill adapter transforms every drilling machine into a powerful riveting tool. Specification: total length: 180 mm. for rivet nut sizes: M3-M10. Maximum speed: 240rpm Drive: 1/4 inch HEX Material: Aluminum alloy + alloy steel colour: red+black Package Contents: 1 x Riveting conversion head 6 x Adapter 1 x Wrench 150 x rivets 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.