This is Tarot TL100D04 Efficient Folding Propeller(CW+CCW).

Tarot 1555 high efficient folding propeller bracket adopts 6061T6 aluminum alloy CNC processing. It is compatible with all kinds of motors which have 12mm x 12mm mounting holes. The propeller with a metal folding bracket is easy to carry and is of high efficient. The 1555 folding propeller adopts a new optimized propeller size design and high-strength engineering material.
So the Tarot 1555 propeller has better flexibility and stability, it could gain over 10% efficient improvement and stronger power reserve. It is compatible with quad-copter, hexa-copters, octa-copter, and some other multi-copter

Features:

1. Compatible with various disk-type multi-copter motors
2. Gives a 10% efficiency boost.
3. Has higher strength than original DJIs.
4. More convenient to install and disassemble than that of DJIs.
5. Convenient to transport so as to protect the propellers.

Package Includes:

1 x 1555 Folding Propeller Pair CW
1 x 1555 Folding Propeller Pair CCW
1 x Fitting Screw Accessories