Somta Series 751 – 5MM HSS-Co5 Parallel Shank Chucking Reamer PLUGLINE 300-600 mm Inflatable Blocking Plug – Heavy-Duty Pipe Sealing Solution 5mm HSS Jobber Drill is

5mm HSS Jobber Drill is a precision-engineered tool designed for optimal performance in metal drilling applications

To know what size the insert should be it refers to the last two digits in the code -  DER 2525 M22 meaning a 22ER insert

5 UNC (Unified National Coarse)

Its smooth operation and fine measuring points make it a practical and reliable instrument for specialised dimensional inspection tasks

M12 Nut - 15 PCS

Somta Series 751 – 5MM HSS-Co5 Parallel Shank Chucking Reamer PLUGLINE 300-600 mm Inflatable Blocking Plug – Heavy-Duty Pipe Sealing Solution 5mm HSS Jobber Drill isSomta Series 751 5MM HSS Co5 Parallel Shank Chucking Reamer The SOMTA 7510500 5MM HSS Co5 Parallel Shank Chucking Reamer is a precision engineered tool designed for optimal performance in metal drilling applications. Key Features & Benefits Manufactured from high speed steel with cobalt for enhanced durability. Straight shank design allows for easy mounting in standard chucks. Precision ground flutes ensure efficient chip removal and smooth cutting.