Features:
For the usage of MT shank, taper shank drills, reamers reducing.
The reducing drill sleeve is made from high quality 45# steel, sturdy and durable in use.
Adopts overall quenching process, long life, lasting, strong shock-resistance.
High accuracy, inside and outside are very smooth.
Easy to store and maintain, very practical tool.

Specifications:
Model: 1-2 2-3 3-4
Material: 45# steel
Hardness: HRC58

Size:
MT1- MT2: length: 92mm / 3.62in, bottom hole diameter: 12mm / 0.47in
MT2- MT3: length: 112mm / 4.41in, bottom hole diameter: 17mm /0.67in
MT3- MT4: length: 133mm / 5.24in, bottom hole diameter: 23mm /0.91in
Weight: 569g

Package included:
1 x MT1- MT2 Taper Adapter
1 x MT2- MT3 Taper Adapter
1 x MT3- MT4 Taper Adapter

Note:
Please allow 1-3mm error due to manual measurement. Thanks for your understanding..