How to Use 4 KNOBS

Load Stronger. Launch Quicker.

4 KNOBS is a baseball and softball hitting training device designed to help hitters see, feel, and hear their swing in real time. By training proper hand torque, swing axis, and launch timing, 4 KNOBS helps players develop a shorter, tighter, and more powerful swing — without relying on raw strength.

Step 0: Proper Setup (Very Important)

• Choose the correct Right-Handed or Left-Handed 4 KNOBS model
• The arm sling (yellow / orange) must face toward the pitcher
• The arm sling dowel (black stick) sits under the sling
• A metal stop sits just above the sling and creates the audible click at launch

⚠️ The arm sling is your swing axis and swing radius guide — not the barrel of the bat.

Snapping the barrel rearward or using the barrel as the swing axis creates a long, slow swing and poor posture.

Step 2: READY TO LAUNCH — “Make the 4”

Find the Rotation Point

As you load:

• The arm sling stays vertical
• The handle turns to approximately 45 degrees
• This creates the visible shape of the number “4”

This vertical arm sling position becomes your launch-ready swing axis.

The longer you keep the arm sling vertical:

• The tighter your swing radius becomes
• The later you can launch
• The better your posture and barrel accuracy

🎯 Goal: Be shorter, tighter, and more precise — without sacrificing power.

Step 3: LAUNCH — Launch Quicker

Time to Fire

As the swing launches:

• The arm sling dowel moves inside-out toward the back shoulder
• There is NO early supination of the top hand
• There is NO adduction of the back elbow

The spine, lats, and rhomboids engage explosively while:

• The bottom hand braces
• The front side delivers the barrel
• The swing stays short and fast

❌ Do NOT pull or chicken-wing
❌ Do NOT drag the barrel
❌ Do NOT dump the barrel behind you
❌ Do NOT lean backward at the spine

The Audible Click — Peak Barrel Acceleration

When the arm sling rotates and hits the metal stop, you will HEAR the click.

This click tells you:

• You are at peak barrel acceleration
• It occurred as close to contact as possible

This is where the whipping effect happens — the knob hooks, the swing radius shortens, and bat speed peaks at contact.

Power with precision.

Why This Matters in Games

Great hitters:

• Reach peak acceleration quickly
• Can wait longer to decide
• Drive the ball to all fields
• Handle velocity and off-speed

One-dimensional hitters rely on extension and raw power. 4 KNOBS trains hitters to be adjustable, explosive, and consistent.

Training Protocol

• 20–30 minutes, morning and evening
• Focus on quality reps and feel
• Reinforces proper movement patterns
• Activates the central nervous system before practice

⚠️ Children under 10 years old must be supervised when using 4 KNOBS.