Didn't look closely at the pictures. These are not exercises as the name might suggest. These are acupuncture needles. So yes, they can clear a major blockage. But they cannot help you with partial blockages or burned-in PLA residues.
BIGTREETECH SKR 3 EZ Control Board 32Bit New Upgrade Silent Board Support EZ2209/ EZ5160/ EZ2130 Stepper Driver Compatible TFT Series Touch Screen, DIY For Most FDM 3D Printer (With 5PCS EZ2209)
7 Review
Pack Of 5 TMC2208 Stepper Motor Drivers For 3D Printers, DORHEA V1.2 Module With Heat Sink And Screwdriver For RepRap, RAMPS1.4, MKS, Prusa I3, Ender-3 Pro Controller Boards
19 Review
10Mm X 11Mm Black Plastic Open Type Cable Wire Carrier Drag Chain Towline R18 For 3D Printer And CNC Machines - 1 Meter Length
7 Review
BIGTREETECH TFT35 V3.0.1 Graphic Smart Display Controller Board For 3D Printer Ramps 1.4 RepRap 3D Printer Can Select Two Work Modes
13 Review
๐จ๏ธ ANYCUBIC Assembled Innovation Off Line Printing: Streamline Your Printing Process with Cutting-Edge Technology
5 Review
๐จ๏ธ FLASHFORGE Adventurer: Enhanced 3D Printer with Removable Extruders and Monitoring Features
4 Review
UV Curing Standard Photopolymer Printer by IFUN
5 Review
High-Precision And Stable Creality Ender 3 V2 3D Printer With New UI, Silent Mainboard, Effortless Filament Feed-In, XY-Axis Tensioner, Resume Printing, And Large Build Volume Of 220ร220ร250Mm
11 Review