Brand: Allstar Performance Manufacturer's Part Number: ALL10540 Part Type: Tire Sipers & Tread Tools Product Line: Allstar Performance Tire Siper Heads Automotive Fittings Part Number: AAF-ALL10540 UPC: 848238051094 Tool Power Source: Manual Number of Blades: 8 blades Material: Brass Color: Natural Quantity: Sold individually. Notes: Blades are sold separately. Head works with pistol grip and other heated sipers that accept a 0.400 in. round mandrel. Description: Allstar Performance tire siper heads are designed for use with Ideal IHK 125 grooving irons; or pistol grip and other heated sipers that accept a 0.400 in. round mandrel. These heads have spacers to convert grooving irons to a 4- to 8-blade siping tool.