For me the big win with In The Slot is the sheer number of uses. It's designed to keep the trail arm connected with the freedom to let it come away, and that alone makes it a great tool in a coach's bag — but I use it for rotation, shallowing, stopping the over-the-top move, and for speed through a lead-scapula stretch too. It's not the sexiest-looking aid and it hasn't been marketed hard, but it's premium built and it works. It really comes down to you: if your trail arm gets behind you or disconnects, this helps a lot. If that's never been your issue, you may not need it. For golfers who do struggle there, and for coaches, it's a genuinely solid buy.
COACHES QUICK TAKE
Use code ROSSEVES at Pure Swing Products
THE REVIEW
Quick bit of honesty first: some links on this page are affiliate links and my code earns me a commission. I only review kit I've actually coached with, and using my code costs you nothing extra — it just keeps these reviews independent.
Tested by PGA coach Ross Eves, In The Slot is a chest-strap swing training aid that costs $109.99 (around £86 for UK buyers). It's a triangular green piece of plastic on an elasticated band that straps around your chest. The name gives away the original idea — getting you "in the slot" — but honestly, I don't think the inventors realised quite how many uses it has, and that versatility is the main reason I rate it. It's premium built, and I love that it folds away into the golf bag.
Here's where it earns its place for me. First, trail-arm (right-arm) position in the backswing: I sit the green part on the seam line to keep the right arm in front of the body. Biomechanically I don't like the trail arm getting behind that seam line in the takeaway or mid-backswing — it retracts the scapula too much and leaves the glenohumeral joint over-mobile, which breeds inconsistency. Keeping the arm in front fixes that.
It does the same job in the downswing. When the trail arm gets internal and behind you, the clubhead steepens. Keep it in front of that seam line and you shallow the club and promote real width — which is exactly what you want.
Then there's connection. Tucked under the groove below the lead arm it gives you connection without restriction — the arm can still work across the body. Used the way the brand intends, you sit the trail arm into the groove, keep connection into the backswing, let it come off at the top, then reconnect in the downswing. It's a bit like the TRS Slider, but without the forced connection — you get the feedback and the freedom rather than being locked in.
Beyond that: pop the green cone in the centre of the chest to free up torso rotation; keep it facing away from the target to stop an over-the-top player spinning out; use the "away in the backswing, toward the target in the downswing" cue to teach beginners rotation; and for speed, sit it on the lead arm, keep that arm still to start the downswing and turn the chest into the slot — it stretches the lead scapula and that stretch is where a lot of long-drive and big-hitting speed comes from. You can even use it for putting to feel a quiet, connected stroke.
Pure Swing also sell it bundled with the Precision Impact, which is worth a look if you want both in one go.
It's not the flashiest-looking aid and there's been very little marketing around it, so it flies under the radar — but it's a genuinely solid tool. Like any training aid the price can feel steep, especially in the UK, though in the US it's often less than a green fee and you've got it for good. As ever, it comes down to whether it fixes something in your swing.
You can buy In The Slot direct at Pure Swing Products — use code ROSSEVES to save on your order.
Tested July 2026.
Pros
Cons
One aid, many jobs — trail-arm connection, rotation, shallowing, over-the-top, speed, even putting
Keeps the trail arm in front of the seam line — biomechanically sound, avoids over-retracting the scapula
Promotes width and shallows the club through transition
Connection with freedom — not restrictive, the arm still works across the body
Excellent speed drill — stretches the lead scapula to help add clubhead speed
Premium build and folds away neatly into the bag
A genuinely useful coaching tool across ability levels
Not the flashiest-looking aid — little marketing means it's easy to overlook
Premium price — can feel dear in the UK, though it lasts and is often less than a US green fee
So versatile it needs a bit of guidance to get the most from it
If your trail arm doesn't disconnect or fall behind you, you may not need it
Not a forced-connection tool — if you want it to force the position, the TRS Slider does that
BRAND
CATEGORY
PRICE
BEST FOR
Pure Swing
Training Aids
$109.99 (approx £85)
Golfers whose trail arm disconnects or drops behind the body — and coaches who want one aid for connection, rotation, shallowing and speed
COACH'S VERDICT
For me the big win with In The Slot is the sheer number of uses. It's designed to keep the trail arm connected with the freedom to let it come away, and that alone makes it a great tool in a coach's bag — but I use it for rotation, shallowing, stopping the over-the-top move, and for speed through a lead-scapula stretch too. It's not the sexiest-looking aid and it hasn't been marketed hard, but it's premium built and it works. It really comes down to you: if your trail arm gets behind you or disconnects, this helps a lot. If that's never been your issue, you may not need it. For golfers who do struggle there, and for coaches, it's a genuinely solid buy.
- Ross Eves, PGA Professional
FREQUENTLY ASKED QUESTIONS
What is In The Slot and what does it do?
It's a chest-strap aid with a triangular green guide. The original idea is getting you "in the slot", but it doubles as a trail-arm connection, rotation, shallowing and speed trainer.
What can you actually use In The Slot for?
Trail-arm position in the backswing and downswing, keeping the arm in front of the seam line, freeing up torso rotation, stopping an over-the-top move, teaching beginners to rotate, a lead-scapula speed drill, and even a connected putting stroke.
Who is In The Slot for?
Golfers whose trail arm falls behind them or disconnects, players who get steep and need to shallow the club, and anyone chasing more rotation, width or speed. Its versatility means it suits a wide range of faults — and it's a great coaching tool.
In The Slot or the TRS Slider?
Both train connection. In The Slot gives you feedback with freedom — the arm can come off and reconnect; the TRS Slider forces the connection. Pick In The Slot for versatility, the TRS Slider if you want the position forced.
Is In The Slot worth it?
If it fixes something in your swing, yes. It's versatile enough to earn its keep, it's premium built and folds into the bag. The price can feel steep in the UK, but in the US it's often less than a green fee and you've got it for good.
Is there an In The Slot discount code?
Yes — use code ROSSEVES at Pure Swing Products to save on your order.
Who should skip In The Slot?
If your trail arm doesn't fall behind you or disconnect, you may not need it. It also rewards a little guidance — a coach or the brand's drills help you get the most from it.
Ross Eves Msc, Bsc Hons
PGA Golf Professional - Biomechanics Coach
Ross Eves is a golf professional and biomechanics coach based in the UK. He specialises in swing analysis, golf fitness and helping golfers at all levels improve through evidence-based coaching methods.