Features: brand new and high quality Featuring a special billet aluminum sleeve that accurately positions the shaft and keeps it from wobbling. Fits all small and big blocks including popular sizes of 327 350 355 383 388 400 406 427 434 454. Designed to fit in your distributor hole and require no modifications to use. Primer shafts are rated at 170,000 psi to ensure extended service life. Thick shaft design with for triangle shaped end for no slippage. For use with 3/8" or 1/2" chuck hand drill. These oil pump primer lets you spin the oil pump with a drill motor and bring up the oil pressure and moving the oil to the top of the engine prior to starting the engine, preventing unnecessary wear or damage to rotating and for valve train components. Specifications: Material: Aluminum Alloy Length: approx 23.5cm/9.25 inches Package Includes: 1x Oil Pump Primer Tool note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item.