Thin insulin style syringe.
Dissolve 100mg in between 0.5-1ml of sterile water.
Don't inject more than 1ml at a time in arms or 2ml in thighs/buttocks.
Ensure ket is added to boiled water or boil water when adding. Allow to cool.
Pull ket via syringe, ensure you use a filter. Either the ones that come in injection trays (needle exchange) or cigarette filter. I strongly advise using a filter, particles can gather in cut batches or in trays/vials.
Alcoholic swab the injection area. Use isopropyl diluted in water or else the swabs from an injection pack. Note: This is for swabbing on your skin, DO NOT inject alcohol.
Stretch area you intend to inject with thumb and index finger - this helps ensure IM and prevent subcutaneous dosing.
Insert needle, slowly inject.
Remove needle, immediately massage area. Clot area if needed.
Wait at least 30-60 mins between dosing, overdosing an IM isn't nice.
Thigh (avoid too close to groin due to nerve damage), buttocks (watch for damage to sciatica nerve) or deltoid in arm.
Remember to rotate injection sites.
Be sure you have the tolerance to be doing IMs, if you can still sniff ket in small amounts or khole by insufflation I strongly recommend avoiding IM. You will become a habitual user, so consider this a warning.
I would only IM if insufflation is causing damage.
More info:
https://www.drugs.com/cg/how-to-give-an-intramuscular-injection.html