KS Tools 136.1105 Tap Seat Milling Set, 1/4"–1", 6-Piece
Product description
The adjustable spring milling head and regulation screw are designed to help mill a tap’s valve seat accurately, making this set relevant when a leak is traced to that area.
It is a repair-focused tool rather than a general tap kit: the stated use is addressing leaking taps caused by valve-seat problems. A six-piece set, it includes a graded cylindrical fitting for standard threaded fittings.
For a tap with a valve-seat fault, this offers a more targeted approach than replacing the whole fitting straight away. The fault still needs to be in the seat, this is not presented as a remedy for every cause of a leak.

Best use cases
This KS Tools set is intended for milling valve seats when they are causing a tap to leak. The spring milling head and regulation screw allow adjustment during the operation, while the included graded cylindrical fitting is described as fitting all standard threaded fittings. That makes it useful to consider for a repair where the seat itself is the issue, rather than for routine plumbing tasks or general cutting.


In practical terms, it may suit someone dealing with a leaking tap who wants to work on the valve seat instead of immediately choosing a full tap replacement. It is a more specialised purchase than a basic household tool: the benefit depends on correctly identifying the source of the leak and needing this particular milling function. You’ll like it if your repair calls for seat milling and you want the cutter and fittings kept together in a storage case.

Technical overview
- Name: KS Tools 136.1105 Tap seating milling set
- Type: Interchangeable cutter set
- Set size: 6 pieces
- Size: 1/4"–1"
- Material: Plastic
- Weight: 395 g
- Cut type: Straight cut
- Cutting diameter: 0.38 inches
- Item diameter: 0.25 inches
- Number of flutes: 1
- Adjustment: Spring milling head and regulation screw
- Fitting: Graded cylindrical fitting included, stated to fit standard threaded fittings
- What’s included: Interchangeable cutter and durable plastic storage case
The specifications give the cutter’s cutting diameter and item diameter separately, so they should not be treated as interchangeable measurements. The product information does not list additional accessories beyond the set and its described included fitting.

Pros


The main practical advantage is the focused design: the adjustable head and screw are intended for accurate milling of tap seats, rather than asking a general-purpose tool to do a specialist job. The interchangeable cutter and storage case also keep the set’s components together between repairs. Compared with replacing an entire tap, seat milling is the more targeted route when the valve seat is the cause, replacement may make more sense where the fault lies elsewhere or the tap needs broader work. Better avoided if you have not identified a valve-seat problem, as the stated purpose does not cover other leak sources.
Practical questions

What problem is this set designed to address? It is intended for accurate milling when valve seats are causing taps to leak.
Can the milling head be adjusted? Yes. The product information specifies a spring milling head and a regulation screw.
Does it come with a case? Yes. It is described as supplied in a durable plastic storage case, along with an interchangeable cutter.
Final verdict
Choose the KS Tools 136.1105 if the job is specifically to mill a tap’s valve seat and the included graded cylindrical fitting suits the threaded fitting involved. Its specialised purpose is its clearest reason to buy: it gives a repair-minded alternative to replacing a whole tap when the seat is the identified cause. If the leak has not been traced to the valve seat, or the repair requires a different kind of tool, this set’s stated function may not be relevant.
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