Expansion insert, type B-Lok® 821-823
LOADING ZOOM 
Expansion insert with slot, type 821 up to 823 for soft plastics and hard wood.
Description
Self-locking expansion insert in brass with slot from Specialinsert® that provides an easy to mount solution for low and middle performances. These are available in M3 up to M8 innerthread and can have 1 or 2 vanes for extra rotational grip.
The self-locking function depends on the elasticity of the receiving material.
