Solid aluminum alloy material, durable, resistant to corrosion and rust With scale on the stick, you can do some simple measurement under the water easily It can be used to point out interesting subsea creatures to your buddy, anchor yourself off the fragile corals or rough rocks, but more importantly you can use the stick as a tank banger to attract attention With adjustable comfortable silicone rubber wrist strap for preventing lost Great accessories for scuba diving or other underwater sports