It is press-in expansion type Brass Inserts
Press Lock Type Brass Inserts insert designed for use in
Thermoplastic molding.it requires vary low screws installation
torque and has self-locking action Brass Inserts Press Lock
Type Brass Inserts Tappex Emhart type Injection Moulding
Inserts injection Molding inserts Insert Molding insert
Moulding.