7/16 inches shank hole saw adapter made of top alloy-steel material heavy duty capability and super-fast to attach to speed all your jobs improve your work efficiency This hole saw arbor fit most 1-1/4 to 6 inches hole saw such as , ,, Cle-Line etc. as long as the hole saw can fit 1/2 thread with 2 pins 0.43 inch Hole Saw Arbor with PIN DRIVE Positive Lock and Quick Change function helping prevent the hole saw from locking on the arbor. This is the preferred design is fast and easy to engage and disengage 7/16 inches hex shank hole saw arbor: Made of alloy-steel material Designed for 1-1/4 to 6.625 inches hole saw Pin Drive, Positive Lock, and Quick Change that make this Speed Arbor tool you fully enjoy using. Makes work go faster with improved ease. You get expected results in less time. Colour:black Material:steel Size:120*11mm Package Contents: 3x twist drill 1x hex wrench 1x connecting rod Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.