Metal Nut: Made of metal material, sturdy and stable. The plastic nut on the market often break during use, the all-metal nuts in this set are and reliable, ensuring and safety in your rotary tool applications 4486 Chuck: This collet are made of high quality stainless steel, specially heat-treated, durability. Tool jaws are perfectly shaped, internal three claw design, easy to grip the rotating blade attachment, solid metal construction for strength Drill Chuck Collet Set: Our chuck set with with 11pcs (0.3 0.8 1.0 1.2 1.6 1.8 2.0 2.2 2.4 3.0 3.2 mm) brass collet, 3pcs chuck and 2pcs wrench. It can meet your different needs for more applications Brass Collet: Made of high quality brass for wear resistance and durability. 4-claws design ensures powerful gripping, firmly holding drill bits in place Wide Application: Our drill chuck collet chuck set is compatible with for rotary tool and ideal for light-duty accessories including drill bits, sanding drums, polishing wheels, wire & bristle brushes, and cut-off wheels, Weight: 0.08708259349 pounds, Manufacturer: Jeerylow