Putt Perfect 70mm Golf Putting Practice Tee.

You crouch behind the ball, read the line, stand over it, align the face and roll it. The ball slides past the right edge. You look back at the line and blame the read, but the real problem was the face.

Human aim judgement is accurate to only about two or three degrees, and two or three degrees of face rotation at three metres moves the ball more than ten centimetres, exactly one cup. What you felt as square was never square.

These tees fix that in one move. Push one into the green on each side of the ball so the two form a straight line, then set the face against that line. The moment it opens even slightly you see it, because the mismatch between face and line is magnified several times over. Roll the putt: if the ball passes through the gap between the tees, you really did putt straight; if it hits one, there is nothing left to guess about.

Each tee is turned hardwood, seventy millimetres, one gram, matte white with two black rings around a two-line print. Twenty millimetres into the turf and it stands firm, and it pulls out clean.

Eighteen come in one bag, enough to build gates and corridors all afternoon and still have spares. One warning: do not substitute metal or plastic tees. Metal scores your putter face, and plastic goes brittle in the cold and bends in the heat.

• Stop guessing whether you putted straight.

• One gram that turns putting feel into fact.

• Eighteen in a bag, a full season of practice.

1. Turns putting straight into a visible line: two tees define a reference, and one or two degrees of face rotation becomes obvious, so you stop guessing.

2. Pass the gate and the direction is right: three or four tees form a gate the ball must pass through; hitting a tee means the face was off, feedback more direct than any app.

3. Hardwood protects your putter: wood deforms itself on contact, so you can practise close to the head, which metal and hard plastic tees cannot offer.

4. 70 mm and one gram, firm in the ground and light in the hand: twenty millimetres of insertion holds it upright, the weight is imperceptible, and eighteen tees drop into a bag pocket.

5. Matte white with black print and no glare: readable on turf and on dark mats, comfortable for an hour of practice, and the PUTT PERFECT print makes you want to roll a few more.

How to Use

1. Face-square line (basic): insert one tee on each side of the ball, the tee-to-tee line parallel to the target line and slightly wider than the putter head. Place the face against that line and keep it aligned through the stroke; any opening or closing shows up immediately as misalignment with the line.

2. Start-line gate (intermediate): insert two tees 20 to 30 cm ahead of the ball, spaced slightly wider than a ball, forming a gate. The ball must pass through. This step converts the belief of putting straight into the objective fact of hitting or missing a tee.

3. Break corridor (on-course): insert a tee every short interval along the break you predict, forming a curved corridor. Roll balls along the corridor to test whether the read was right; four to six tees cover a typical three-metre break.

4. Four-point frame and mirror anchoring (with training aids): insert one tee front, back, left and right of the ball as a box for calibrating stance and ball position; with an acrylic putting mirror, insert tees into the mirror ports or the turf at its edge to extend the mirror line outward.

5. Extraction and care: pull by the 15 mm tail, straight up, without levering sideways, to avoid snapping the tip. Wipe off soil and dry in shade before storing to prevent discolouration from lingering moisture. Coating wear is normal and does not affect the geometric function.