HIGH QUALITY MATERIAL: This drill chuck for is made of high quality brass and is characterized by its sturdiness and flexibility. With high hardness and high torque, it offers higher durability and longer service life than aluminum parts.VARIOUS COLLETS SIZES: The set includes 10 different collet collets: 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm and 3.2mm. This makes it Perfect for quickly changing accessories with different shaft diameters.COMPREHENSIVE SET: This means that you are very flexible in your projects.PRECISE & COMPATIBLE: This drill chuck adapter set is more precise than its predecessor models and holds small drill bits and accessories better. Please compare the dimensions before purchasing. Compatible with for almost all models except Series 1 and 2 as well as 260, 270, 280 and 4200.WIDE RANGE OF APPLICATIONS: Perfect for impact wrenches, electric screwdrivers, heavy hammers and electric screwdrivers. Suitable for factories, warehouses, construction sites, etc. Material: brasscolour: As Shown Package Contents: 1 x storage box10 x chucks with a diameter of 0.5 to 3.2 mm1 x for chuck (4485)1pcs x 1/32inch to 1/8inch keyless chuck (4486) 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.