28 mm Indexable Inserted Endmill Shank 25 dia 28 Mm 2 pockets Suitable To APMT1604 U DRILL 34.5MM there are many Chinese brand

there are many Chinese brand also making same inserts so you can just check description of size from other brands to fix this insert

Avoid the drill dropped when used in instaneous change of direction and equipped with spanner hole for tightening prefect safety

ER16M Outside diameter is

R390 11T3-C25-25-200L-3T

CNMA120408/12 TK1509 Carbide Insert with 0

28 mm Indexable Inserted Endmill Shank 25 dia 28 Mm 2 pockets Suitable To APMT1604 U DRILL 34.5MM there are many Chinese brand28 mm Indexable Inserted Endmill Shank 25 dia 28 Mm 2 pockets Suitable for APMT1604 NOTE: Non Standard Size This is a Shoulder and Face Milling Cutter used mainly in CNC Milling and Manual Milling Machine with ISO Carbide Insert, Using this can reduce the cost really low compared to HSS, and changing of insert time is also very low, They are hardened 45 50 HRC not to wear out, Pockets are well designed so insert and pocket seat have no gap in them,