Koopadvies Knuppels

Tegenwoordig eisen bepaalde bonden dat jeugdknuppels een bepaalde certificatie hebben.
De K.N.B.S.B (Nederlandse bond) volgt de USA certificering.
De tegenhanger van USA is de USSSA certificering.
Omdat bepaalde andere landen juist weer USSSA toestaan verkopen wij deze knuppels ook en is het aan de klant om te weten wat er aangeschaft dient te worden.
Onderstaand de logo's van deze certificeringen:

USA Certificatie USSSA Certificatie



Barrel Size

- The measurement of the diameter around the bat.
- Generally, the longer the barrel the larger the "sweet spot" for making substantial contact.
- Many players prefer a smaller barrel diameter that lightens the weight and provides more swing speed.
- Barrel size varies by league.


- Also known as a bat's length-to-weight ratio or a bat's minus (-) number, i.e. -3, -5, -10, etc.
- Defined as a negative number denoting the amount of ounces the bat weighs less than the amount of inches its length. Basically stated, it's the difference between the weight of the bat minus the length of the bat.
- Wood bats and Slow Pitch bats are not identified with a drop.

Selecting a Bat by Age or by Length and Weight

Selecting the correct bat weight really depends on two critical factors: your strength and hitting style. It also depends a lot on your personal preference in weight and length, so the following are simply guidelines to follow:

- Bigger, stronger players generally prefer a heavier bat since they get the benefits of substantial swing power and ball-carrying distance.
- Smaller players looking more for groundball hitting through the infield should consider a lighter bat to generate a quicker swing.
- Younger players should think about starting out with a lighter bat, where they can practice their stance, batting form, and running out base hits.


When searching for the perfect bat, size matters. This is also an important step for promoting player safety. Youths starting out in the game need to be able to work on their form, technique, and batting stance. To do this, it's important to tailor the bat to fit their specific needs.

Tips for Beginners

- Lightweight alloy bats increase the size of the "sweet spot" on the barrel that allows for solid contact.
- A starting player needs to learn to hit close to the "sweet spot."
- Go for a lighter bat to maintain bat speed, which is top priority in hitting.
- Have a light enough bat to swing with enough bat speed to hit the ball powerfully.
- If they cannot hold the bat for 20 seconds without the arm starting to shake, it's too heavy.
- You'll see right away which ones are too small, too big, or too heavy. If your youth needs to slide his hands up from the knob end of the bat to give him more control, then go to the next inch-size down.


Understanding Bat Materials for Adult Bats


- Industry leading technology provides the best balance and largest sweet spot among all bat categories.
- Seamless balance and a controlled swinging motion.
- When making contact with the ball outside of the sweet spot, the bat vibrates less in your hands.
- Lighter weight which increases a player's swing speed for the contact hitter.

Performance alloy:

- Stronger alloys allow for thinner bat walls and improved "pop" off of the bat.
- Material is strategically placed for a more balanced feel.
- A larger sweet spot than basic alloy bats for the power hitter.
- Double-layer bats offer more durability and power.


- Great batting cage and training bats.
- Wood bats authentic feel and sound is unparallel.
- Provides more ability for a customized swing and correct batting form.
- Usually made of maple, bamboo, ash or composite wood materials. Special features of the most popular types of wood bats:

- Maple: a high density wood providing power, maximized balance, and ease of handling, made from close-grained timber which increases durability, closed pores compress the wood to make it harder.

- Bamboo: a high density wood for power and balance, features a cupped end making it lighter for quicker and more powerful swings, exceptional durability and offering superior strength and moisture control.

- Ash: tends to flex rather than break providing a larger sweet spot, thin handle provides an extremely balanced and lightweight bat for the wider range of large barrel models.

Frequently Asked Questions

1. What does the Minus mean? (Examples: -12, -8, -5). Always a minus number, it refers to the weight of the bat. Also referred to as the bat drop or the bat's length to weight ratio. Take the length of the bat and subtract the minus number and that is the weight. So a 33 inch bat that is -3 weighs 30 ounces. For example, if a bat weighs 29 ounces and is 32 inches long, it is said to be minus 3 (29 - 32 = -3).

2. What is a length to weight ratio? This is called "drop" and is a negative number denoting the amount of ounces the bat weighs less than the amount of inches its length.  For example, a 30-inch bat that weighs 20 ounces is a -10. The greatest differential commonly found is -12/-13 for youth bats.

3. Are bats sensitive to changes in temperature? Yes, composite and Aluminum bats, especially higher performance models with thinner walls, should not be used in temperatures below 15 degrees celcius. Cold temperatures make the composition of the ball denser. This puts extraordinary stress on the bat walls which will result in denting. Bats may also be sensitive to very hot temperatures and should not be stored in areas that are exposed to high heat, such as car trunks.

4. Can I try out my new bat at the batting cage? You should not use your new bat in the batting cage. Batting cage balls are made of a more dense material than is used in regulation baseball or softball games and will cause denting.

5. What is metal fatigue? Bat Wall Flexion (allowing the bat walls to flex) is the desirable end result of the "Trampoline Effect," which is utilized by high-performance, thin-walled bats. Hitting the ball on the same side of the bat each time and in the same spot causes excessive flexing in the one area, and the metal will eventually fail (dent or split). Rotating the bat on each trip to the plate will help prevent damage due to metal fatigue.

6. What the difference between balanced and end loaded weight distribution? A balanced bat has an even weight distribution throughout where the end loaded has a half ounce to a whole ounce at the end of the bat.

7. What is the difference between a stiff bat and a flex bat? Flexible bats allow the bat handle to slightly bend on impact. Stiff bats allow the trampoline effect of the bat to be more effective, improving the bat and ball speed over a flex bat or a bat with no action to it, especially on the "sweet spot". The stiff bat lets the swing of the bat be more fluid in motion, which allows for smoother swing and bat speed. Flex bats have the same power when the ball is hit away from the "sweet spot".