This Kit allows you to convert your standard Right Angle Drill Attachment (00400) that will only work with threaded shank tools, to the collet style Right Angle Drill Attachment (00410) that will work with standard round, straight shank tools. Included in the Kit is a Collet Style front gear with gear support and four (4) precision machined collets of 3/32", 1/8", 5/32" & 3/16". Instructions are also included.