Hole Saw Tool Box Set concrete core drill bit Better endurance Tungsten Carbide Tipped 80mm Diameter M14/M16

A hole saw (also styled holesaw), also known as a hole cutter, is a saw blade of annular (ring) shape, whose annular kerf creates a hole in the workpiece without having to cut up the core material. It is used in a drill.

Hole saws typically have a pilot drill bit at their center to keep the saw teeth from walking. The fact that a hole saw creates the hole without needing to cut up the core often makes it preferable to twist drills or spade drills for relatively large holes (especially those larger than 25 millimetres (1.0 inch)). The same hole can be made faster and using less power.

The depth to which a hole saw can cut is limited by the depth of its cup-like shape. Most hole saws have a fairly short aspect ratio of diameter to depth, and they are used to cut through relatively thin workpieces. However, longer aspect ratios are available for applications that warrant them.Cutting with a hole saw is analogous to some machining operations, called trepanning in the trade, that swing a cutter analogous to a fly cutter in order to achieve a similar result of annular kerf and intact core.

φ12-26

12-26mm

15/32 -1 1/32

15mm

58mm

8mm

Less than 6mm

φ27-41

27-41mm

1 1/16 - 1 37/64

9mm

φ42-64

42-64m

1 21/32 - -2 23/64

10mm

Larger than φ 65

Larger than 65mm

Larger than 2 9/16

10mm