Jacobs 20N Super Chuck 3/8-1" Mandrino per trapano con cuscinetti a sfera resistenti con pergolato MT4
Mount: Morse Taper #4 arbor (MT4) installed. Jacobs Heavy Duty Ball Bearing Super Chuck – Model 20N. The Jacobs 20N is the top of the line — USA-made, rugged, and still one of the most sought-after drill chucks for precision heavy drilling.