Stakesy's 4.5" SHRINK-O-MATIC Shrinking Disc

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Stakesy's 4.5" SHRINK-O-MATIC Shrinking Disc

Used for removing dents or lowering high points in bodywork by metal contraction. The friction of the stainless steel shrinking disc on the vehicle panel causes it to heat up. When this 'hot spot' is quickly quenched with water from a spray or wet cloth, the material will shrink to a smaller than original size which results in a lowering of the raised 'dent' or panel area. If the dent is inwards (concave), then it is first dollied out with a hammer or bullseye pick from behind to create a convex dent. This raised dent can then be worked on with the disc from above.

This type of dent removal technique has been used for decades with the use of oxy-acetylene torches. The torches are very difficult to accurately heat the exact area without affecting the area around it. Where the shrinking disc excels is in its ability to precisely hit the high points. With many passes, combined with hammer and dolly work, it it possible to obtain a paintable panel without the use of body filler.

Shrinking discs first appeared in the USA around 20 years ago. The first discs were a corrugated flat shape with razor sharp edges, were incredibly expensive and very noisy to use. Other discs we have imported and sold from the USA since have been pressed out with a flat face. Whilst we haven't invented this product we like to think we have made a few improvents where we saw problems. The flat discs available meant the protruding thread could cause more bad than good if it came into contact with the panel. Our discs are spun with a 15° angled face which allows the complete disc to be used over the panel without fear of spindle contact. The discs are made from a 16swg alloyed stainless steel and supplied with a spacer boss and 1+2mm shims to allow a perfectly flush fit of the tightened nut whilst allowing the original grinder guard to be left in place for safety. The side of the disc has a 7mm returned safety edge. The combination of this edge and the spun contact angle makes for a very rigid and stiff disc.


All 4.5" angle grinders use a 14mm spindle with an M14 thread. These spindles do, however, vary slightly in length and width of the spindle shank, thread and location step which can be seen in the attached illustration. To get the best concentricity (disc spinning centrally to limit vibration) it is important to choose the correct spacer boss.

90% of grinders from Metabo, Bosch, Black & Decker, Milwaukee, DeWalt and Makita will use our BLACK spacer boss which has the larger hole of the two available. We have found that some angle grinders, such a Ryobi, have a slightly undersize thread. These undersized grinders will need the GREY spacer boss which will ensure all tolerances are reduced, making the disc run central to the spindle and get the best experience from the product. If you don't have access to a digital vernier then choose the BLACK spacer. If you have various grinders you may want to choose both. Spacers are also available for £7.50 inc vat on a separate listing.


Whilst our shrinking discs will give years of use they are, in effect, a wearable part so we offer an exchange policy with a 25% discount against a new disc should you ever wear it out. (discount is based on current RRP.)

Product Code: 
STASD+BLACKShrinking Disc + Black Adaptor
STASD+GREYShrinking Disc + Grey Adaptor
STASD+BOTHShrinking Disc +  Both Adaptor's
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Manufacturer Stakesys

Delivery & Returns

Items under 30kg will be shipped by either 24hr courier or 1st class Royal Mail depending on item and weight and size.
All orders will be packaged and despatched same or next day. Orders made later in the day will most likely be sent out the following day.
We use a Next Day Delivery service however this service is subject to stock, courier availability and courier area. A signature is required for courier deliveries so please arrange for someone to be in at delivery address.   

Delivery prices are calculated by total order weight & size and are as follows:


UK Mainland

Highlands & Islands










45kg +



Buying from outside GB Mainland.

We are happy to deliver worldwide upon request. Because of the many variables involved our website cannot calculate global shipping or deduct UK Tax, please call on +44 1509 812171 or email and we will work out the best price for you.

Heavy Goods Items/ Pallets

If you are ordering to Mainland UK or Highlands and Islands, once added to your basket, our shipping calculator will work out a shipping price depending on your delivery post code. Delivery can take up to 4 working days from point of order but is often sooner depending on location. We will call to let you know estimated delivery date, you may be required to help the driver move the product from the roadside to your desired location, please ensure somebody is in to receive the goods as there is a redelivery charge of £30 should you miss it.

We also ship heavy goods and pallets worldwide, however not through the website, please call on +44 1509 812171 or email

Returns Policy 
Stakesy’s Guarantee: 14 Day Money Back Guarantee 

1/ Items returned under the 7 working day cancellation period 
If for any reason you are unhappy with your purchase, you can return it to us in its original condition within 7 days of the date you received the item, unopened (with any seals and shrink-wrap intact) and we will refund the cost of the item and the cost of sending the item to you as follows: 
-where you are returning an item that was part of a larger order, we'll refund the per-item charge for delivery that you incurred -where you are returning an entire order, we'll refund all delivery charges that you incurred -we will refund only standard shipping charges for items delivered mainland UK (excluding Highlands & islands and orders over 25 kilos in weight)

2/ Items returned under 14-day returns guarantee 
Where you are withdrawing from your purchase between 7 and 14 days after delivery, and there has been no error on our part, we will refund only the cost of the item minus 10% handling charge. We will not refund the cost of delivery or other services provided to you in connection with your purchase.

3/ Any goods items over 60 kg that have incurred special freight charges are excluded and the buyer will be responsible for both arranging and the costs of the return delivery.

Refunds will be paid within thirty days of cancellation. 

Please post goods to be returned or exchanged to:

Stakesy’s Metalwork Machinery, Unit 12 Hayhill Industrial Estate, Loughborough, LE12 8LD.

It is crucial that you pack the goods to be returned the same way as we sent out. Please consider that a returned item that is damaged in return transit may well be un-refundable if we cannot re-sell. Please include a note of your requirements and original invoice number.