This is a mortising kit with four different size chisel/bit combinations in 1/4, 5/16, 3/8, and 1/2 inch sizes. It is a combination of Delta models 17-924 (the yoke and fence) and 17-924 (the kit, which included the yoke bits, fence system and case). The fence system can be adapted to any drill press table. The yoke that keeps the chisel section from spinning was designed to fit a large number of Delta drill presses, including:
11-980 10" Model
11-990 12" Model
14-040 14" and 14-070 14" Models
11-090 32" Radial Model
17-900, 17-925, and 17-965 16" Models
And a laundry list of 15" Models.
It may fit other brands as well, since much Delta equipment was manufactured by the same Taiwanese company that makes equipment sold under many brands, including Jet, Wen, Rikon, and more. This kit is unused and has never been setup. Not one of the four chisel/bit combinations has ever been used. I bought a Delta 15" press used from the widow of a fellow who had been a model maker for the Boeing wind tunnel before retiring. I got it along with his Delta Unisaw. She threw in several boxes of stuff that she said went with them including this. I have no use for it. Acme is currently listing the four piece bit set alone for $159.99. Global has it for $155.95. Several people are selling the complete kit in used condition on eBay for the same price plus shipping. It's heavy - 18+ pounds. The going price for just the yoke and fence without the bits is about $65 plus shipping. So if you can use this, it's a steal.